{"title":"Fish \u0026 Bird Antibacterials","description":"\u003cp\u003eUSP-grade fish and bird antibacterials from Aqua Soma Labs. Amoxicillin, cephalexin, doxycycline, metronidazole, azithromycin, ciprofloxacin, penicillin, clindamycin and SMZ\/TMP — sealed bottles, lot-coded, and shipped same business day.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBundle \u0026amp; save:\u003c\/strong\u003e $1 off every bottle when you buy 2 or more, $3 off every bottle at 5 or more. Mix any products in the range — the discount applies automatically at checkout.\u003c\/p\u003e","products":[{"product_id":"fish-flox","title":"Fish Ciprofloxacin 500mg (Fish Flox) Fix Flox Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    --fph-accent: #143583;\n    --fph-danger: #c62828;\n    --fph-warning: #f59e0b;\n    --fph-radius: 18px;\n    color: var(--fph-text);\n    font-size: clamp(15px, 1.05vw, 17px);\n    line-height: 1.75;\n    overflow-wrap: break-word;\n  }\n\n  .fph-product-copy,\n  .fph-product-copy * {\n    box-sizing: border-box;\n  }\n\n  .fph-product-copy .fph-section \u003e * + *,\n  .fph-product-copy .fph-acc-body \u003e * + *,\n  .fph-product-copy .fph-more-body \u003e * + * {\n    margin-top: clamp(14px, 2vw, 20px);\n  }\n\n  .fph-product-copy h2 {\n    margin: 0;\n    color: 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class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Ciprofloxacin 500mg: Ciprofloxacin for Fish with Fin Rot, Ulcers\u003cbr\u003eand Columnaris in Freshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Flox (Fix Flox)\u003c\/strong\u003e from Aqua Soma Labs is fish ciprofloxacin in 500 mg capsules for ornamental aquarium fish and non-food pet birds. Each capsule holds \u003cstrong\u003e500 mg of ciprofloxacin\u003c\/strong\u003e, which works in the water to help manage suspected bacterial problems such as persistent fin and tail rot, columnaris-type patches, and ulcer-like sores when used as directed. The standard aquarium amount is one 500 mg capsule per 10 gallons (38 L) of water, once every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eIn the hobby it is still called Fish Flox, Fish Flox Forte, or Aqua Cipro. Fix Flox, from the Aqua Soma Labs Fix range, is the online replacement for the discontinued Thomas Labs Fish Flox and Aqua-Cipro 500 mg. Aquarists who used to buy fish cipro or a fish ciprofloxacin 500 mg capsule will recognize it as the same product under a new label.\u003c\/p\u003e\n\u003cp\u003eStart treatment early, at the first signs of bacterial stress. Those signs differ between fish and birds, so use the lists below to know what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is intended for aquarium and ornamental fish and pet birds only. It is not for animals used for food.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cp\u003eThis capsule helps with common bacterial problems: persistent fin and tail rot, columnaris-type patches, ulcer-like sores, red sores, hemorrhagic septicemia, swim bladder disease that involves bacteria, and dropsy-like swelling that is often linked to organisms such as Aeromonas, Pseudomonas, Vibrio, or Flavobacterium. Reef keepers also use ciprofloxacin for anemone bacterial infections (deflating or \"melting\" anemones) in a separate hospital tank.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFin and tail rot (frayed or rotting fins)\u003c\/li\u003e\n\u003cli\u003eUlcer-like sores or open wounds\u003c\/li\u003e\n\u003cli\u003eRed sores or red streaking on the body\u003c\/li\u003e\n\u003cli\u003eDropsy-like swelling\u003c\/li\u003e\n\u003cli\u003eColumnaris-type patches\u003c\/li\u003e\n\u003cli\u003eCloudy patches that do not clear with better water quality\u003c\/li\u003e\n\u003cli\u003eLethargy, loss of appetite, or fast decline in activity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird Signs (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFluffed-up feathers, lethargy, or inactivity\u003c\/li\u003e\n\u003cli\u003eDecreased appetite\u003c\/li\u003e\n\u003cli\u003eLoose or changed droppings\u003c\/li\u003e\n\u003cli\u003eLabored or difficult breathing\u003c\/li\u003e\n\u003cli\u003eAny sudden change a vet links to a bacterial problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor birds, only use Fix Flox when an avian veterinarian has recommended ciprofloxacin for a specific problem and has set the amount. Catching a bacterial problem early, paired with stable water quality, good aeration, and suitable housing, gives your fish and birds the best chance to recover.\u003c\/p\u003e\n\u003cp\u003eIt comes in \u003cstrong\u003e30-count and 60-count bottles\u003c\/strong\u003e with fresh expiration dates, so you can buy the amount that fits your situation, whether that is a single hospital tank, several community aquariums, or ciprofloxacin for birds under avian veterinary guidance.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder before 1:30 p.m. CT\u003c\/strong\u003e, Monday through Friday, and your order ships the same day from our U.S. warehouse via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Flox vs Fix Flox: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Fish Flox, Fish Flox Forte, or Aqua Cipro, here is what changed and what stayed the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Ciprofloxacin Strength\u003c\/strong\u003e Fix Flox has the same \u003cstrong\u003e500 mg of ciprofloxacin\u003c\/strong\u003e per capsule you used in Fish Flox Forte and Aqua Cipro, and the formula works on the same bacteria.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e Fix Flox is made by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, which replaced the discontinued Thomas Labs line and manufactures in the United States.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Capsule Form\u003c\/strong\u003e The \u003cstrong\u003ecapsule\u003c\/strong\u003e is the same format as the original Fish Flox, so it opens and dissolves in aquarium water the same way, or you can follow your vet's directions for birds.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eAvailable in 30-Count and 60-Count Bottles\u003c\/strong\u003e Pick the size that fits your setup: a 30-count bottle for a single hospital tank or occasional use, or a 60-count bottle for larger collections and longer treatments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Flox for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eWide Bacterial Coverage\u003c\/h3\u003e\n\u003cp\u003eAs a ciprofloxacin treatment, Fix Flox is generally described as helpful against many gram-negative bacteria and some gram-positive ones. Aquarists use ciprofloxacin treatments like Fix Flox for stubborn infections that may involve organisms such as Aeromonas, Pseudomonas, Vibrio, or Flavobacterium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMade in the United States\u003c\/h3\u003e\n\u003cp\u003eFix Flox is manufactured in the United States by Aqua Soma Labs and ships with fresh expiration dates, so you receive recent stock rather than product that has been sitting on a shelf.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelps Manage Common Aquarium Bacterial Problems\u003c\/h3\u003e\n\u003cp\u003eAs an aquarium ciprofloxacin treatment, Fix Flox is often chosen for stubborn fin rot, columnaris-type patches, bacterial gill irritation, ulcer-like sores, red streaking, hemorrhagic septicemia, or dropsy-like swelling tied to a bacterial infection. It is also used for anemone bacterial infections in a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 500 mg Capsules\u003c\/h3\u003e\n\u003cp\u003eEach capsule is a fixed \u003cstrong\u003e500 mg\u003c\/strong\u003e, which keeps dosing in a quarantine or hospital tank simple to calculate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eEasy to Administer\u003c\/h3\u003e\n\u003cp\u003eThe capsule holds powder that opens and dissolves easily. Mix it in a small cup of aquarium water first, then spread it evenly around the treatment tank. The same method works for tanks of different sizes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eVersatile for Freshwater, Saltwater \u0026amp; Aviary Setups\u003c\/h3\u003e\n\u003cp\u003eAquarists use Fix Flox in both freshwater and marine hospital tanks. For pet birds, give it only under avian veterinary guidance, when a vet decides it is appropriate for a serious bacterial problem.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIdeal for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eA separate hospital tank protects your main aquarium's biofilter and keeps healthy tank mates away from the treatment while you treat the fish that need it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e Always follow the directions printed on your bottle. The steps below cover the usual aquarium-water method for ornamental fish.\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a dedicated hospital tank when you can. A separate tank makes dosing and observation easier and keeps the treatment away from healthy tank mates and your main system's biofilter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003ePrepare and Add the Treatment\u003c\/h3\u003e\n\u003cp\u003eOpen the capsule and dissolve the powder in a small cup of aquarium water, then spread it evenly around the treatment tank. Use \u003cstrong\u003eone capsule (500 mg) per 10 gallons (38 L)\u003c\/strong\u003e of water you are treating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eRepeat and Maintain Water Quality\u003c\/h3\u003e\n\u003cp\u003eRepeat the dose every 24 hours. Do a partial water change between doses to keep ammonia and nitrite low, keep the aeration strong, and hold the tank stable. Continue once a day for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Avian Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eGive Fix Flox to pet birds only under the direction of an avian veterinarian. Do not use the aquarium-water directions to work out a bird's amount. Your vet will set the correct amount for the bird's weight, plus the frequency and duration for the species and condition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eComplete the Full Treatment\u003c\/h3\u003e\n\u003cp\u003eFinish the full recommended number of days even if the fish look better, because stopping early can let the bacteria recover. If you see no improvement after 5 days, stop use as directed on the label and ask an aquatic professional for guidance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Flox Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCiprofloxacin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e500 mg capsules\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e1500 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e2000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 2750 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures come from the label guideline of one 500 mg capsule per 10 gallons, about 50 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 10 days, and round to the nearest practical capsule. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. If there is no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish the full set of treatment days so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for a Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and measuring the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Quarantine sick fish away from healthy ones during treatment. A small hospital tank with a heater, an air stone, and no substrate makes dosing and water changes easier. Take out activated carbon and switch off UV sterilizers during treatment, since both can lower the treatment level in the water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Flox Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eEach capsule holds 500 mg of ciprofloxacin. In simple terms, it works in the water to slow down or stop the growth of certain bacteria when used as directed for ornamental fish. For pet birds, use it only under avian veterinary guidance.\u003c\/p\u003e\n\u003cp\u003eThe rest of the capsule is the shell and standard ingredients that keep the contents stable on the shelf and let them disperse once you dissolve them in aquarium water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed, this product usually causes no problems in aquarium fish and non-food pet birds. As with any antibacterial treatment, the wrong amount or prolonged use raises the risk of side effects and resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eSome fish may hide, eat less, act mildly lethargic, or the water may cloud temporarily during treatment. If a fish shows severe distress, such as rapid gill movement, loss of balance, gasping at the surface, or lying on the bottom, stop treatment, improve aeration, and get aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eGive Fix Flox to birds only under avian veterinary guidance. A bird may eat less, act lethargic, or pass loose or changed droppings, especially if it is sensitive or the amount is off. If your bird looks fluffed up, inactive, or stops eating, stop use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Flox in display tanks with shrimp, snails, or other invertebrates, since these treatments can harm them or upset the tank ecosystem. Whenever you can, move affected fish to a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat fish in a hospital or quarantine tank whenever possible. Remove activated carbon and turn off UV sterilizers during treatment, and watch ammonia, nitrite, and temperature closely. Do not mix this product with other treatments unless a veterinarian tells you to.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety warning\u003c\/h3\u003e\n\u003cp\u003eThis product is for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. It is \u003cspan class=\"fph-inline-warning\"\u003enot for animals raised for food\u003c\/span\u003e. Store capsules in a cool, dry place away from direct sunlight, and keep them away from children and pets. Always follow the directions on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, and orders placed before 1:30 p.m. CT (Monday through Friday) ship the same day. For full details, see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If something is wrong with your order, you may be able to return or exchange items within 30 days under our store guidelines. Before you send anything back, please read our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox Amoxicillin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e Targets anaerobic bacteria and protozoa including Hexamita and hole-in-the-head disease in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole Metronidazole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections and Mycoplasma in fish and non-food pet birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy Doxycycline\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease and avian respiratory concerns. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro Azithromycin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment commonly used for gram-positive bacterial infections including skin and soft tissue concerns in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin Clindamycin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment offering coverage against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa SMZ\/TMP\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen Penicillin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex Cephalexin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish flox?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish flox is a common name for ciprofloxacin sold as an aquarium treatment. Fix Flox is the current version: ciprofloxacin at 500 mg per capsule for ornamental fish and non-food pet birds. Aquarists use it for stubborn bacterial problems such as fin and tail rot, ulcer-like sores, and columnaris-type patches in freshwater and saltwater tanks, not for ich, flukes, or fungus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Flox (Fish Flox) used for in fish and birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Flox (ciprofloxacin 500 mg) is an antibacterial treatment that aquarists use for bacterial problems such as persistent fin rot, columnaris-type patches, ulcer-like sores, red sores, hemorrhagic septicemia, and swim bladder disease in ornamental fish. For non-food pet birds, it may be used under avian veterinary guidance for serious bacterial concerns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Flox and Fix Flox?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Flox was the brand name Thomas Labs used for its ciprofloxacin capsules. After Thomas Labs discontinued the product, Aqua Soma Labs introduced Fix Flox as a direct replacement. It has the same 500 mg of ciprofloxacin per capsule, the same capsule format, and the same ornamental-fish and pet-bird uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Flox the same as Fish Flox Forte or Aqua Cipro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fish Flox Forte was the name for the 500 mg ciprofloxacin capsule, and Aqua Cipro (Aqua-Cipro 500 mg) was another brand of the same ciprofloxacin. Fix Flox from Aqua Soma Labs is the current direct replacement, with the same 500 mg ciprofloxacin per capsule in 30-count and 60-count bottles. The brand names and packaging changed; the capsule and its intended fish and bird use stayed the same.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is inside Fix Flox (Fish Flox)?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Flox contains ciprofloxacin at 500 mg per capsule. It is the same ciprofloxacin that was in Thomas Labs Fish Flox and Fish Flox Forte. The rest of the capsule is the shell and standard ingredients that keep the contents stable and let them dissolve in aquarium water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs fish cipro the same as Fix Flox?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003e\"Fish cipro\" is a common nickname for ciprofloxacin sold as an aquarium treatment. Fix Flox is the current version: ciprofloxacin at 500 mg per capsule for ornamental fish and non-food pet birds. It is the same ciprofloxacin for the same bacterial problems, just under a current label with fresh stock, and it replaces the older Thomas Labs fish ciprofloxacin and Aqua Cipro products.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish ciprofloxacin dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe standard fish ciprofloxacin dosage is one 500 mg capsule per 10 gallons (38 L) of tank water, about 50 mg per gallon, once every 24 hours for 5 to 10 days, with a partial water change between doses. Dose by the water volume of your treatment tank, not by the number of fish. If there is no improvement after 5 days, stop and ask an aquatic veterinarian. Birds are different: an avian veterinarian sets the amount by body weight, so never work a bird's amount out from the aquarium chart.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat bacteria does ciprofloxacin target in fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eCiprofloxacin is generally described as helpful against many gram-negative bacteria, including organisms such as Aeromonas, Pseudomonas, Vibrio, and Flavobacterium, and against some gram-positive bacteria. It works inside the bacteria to stop them from copying their DNA, which slows or stops their growth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy ciprofloxacin for fish? Do Walmart or PetSmart sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Flox, the current fish ciprofloxacin, directly from Fine Pet Health in 30-count and 60-count bottles of 500 mg capsules. General retailers such as Walmart, PetSmart, Petco, and Tractor Supply do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Flox treat fungal, viral, or parasitic infections?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. This product works on certain bacterial infections only. It does nothing for fungi, viruses, or parasites such as ich, flukes, or worms. For a fungal, parasitic, or viral problem, work with an aquatic or avian veterinarian to pick the right treatment instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"500-mg (30 Count)","offer_id":50744370036975,"sku":"483874","price":45.5,"currency_code":"USD","in_stock":true},{"title":"500-mg (60 Count)","offer_id":50744370069743,"sku":"799104","price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-flox-ciprofloxacin-500mg-30-count-fish-antibacterial..webp?v=1789229490"},{"product_id":"fish-cin","title":"Fish Clindamycin 150mg (Fish Cin) Fix Cin Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    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center;\n    justify-content: space-between;\n    gap: 14px;\n    min-height: 56px;\n    padding: clamp(14px, 2vw, 20px) clamp(16px, 2vw, 24px);\n    cursor: pointer;\n    list-style: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary h2 {\n    margin: 0;\n    font-size: clamp(19px, 2vw, 25px);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::after,\n  .fph-product-copy .fph-faq-item summary::after {\n    content: \"+\";\n    flex-shrink: 0;\n    width: 30px;\n    height: 30px;\n    display: grid;\n    place-items: center;\n    border-radius: 50%;\n    background: rgba(20, 53, 131, 0.10);\n    color: var(--fph-accent);\n    font-size: 20px;\n    font-weight: 400;\n    line-height: 1;\n  }\n\n  .fph-product-copy .fph-acc[open] \u003e summary::after,\n  .fph-product-copy .fph-faq-item[open] summary::after {\n    content: \"\\2212\";\n  }\n\n  .fph-product-copy .fph-acc[open] \u003e summary {\n    border-bottom: 1px solid var(--fph-border);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: -2px;\n  }\n\n  .fph-product-copy .fph-acc-body {\n    padding: clamp(16px, 2.2vw, 24px);\n    background: #ffffff;\n  }\n\n  \/* --- See More toggle (intro) --- *\/\n  .fph-product-copy .fph-more \u003e summary {\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    min-height: 44px;\n    padding: 10px 24px;\n    border: 1px solid var(--fph-accent);\n    border-radius: 999px;\n    background: rgba(20, 53, 131, 0.06);\n    color: var(--fph-accent);\n    font-weight: 600;\n    cursor: pointer;\n    list-style: none;\n    transition: background 0.15s;\n  }\n\n  .fph-product-copy .fph-more \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-more \u003e summary:hover {\n    background: rgba(20, 53, 131, 0.12);\n  }\n\n  .fph-product-copy .fph-more \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: 2px;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary .fph-more-open,\n  .fph-product-copy .fph-more:not([open]) \u003e summary .fph-more-close {\n    display: none;\n  }\n\n  \/* open: summary moves below the revealed content *\/\n  .fph-product-copy .fph-more[open] {\n    display: flex;\n    flex-direction: column;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e .fph-more-body {\n    order: 1;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary {\n    order: 2;\n    align-self: flex-start;\n    margin-top: clamp(16px, 2.4vw, 22px);\n  }\n\n  \/* --- Inline Warning --- *\/\n  .fph-product-copy .fph-inline-warning {\n    color: var(--fph-danger);\n    font-weight: 700;\n  }\n\n  \/* --- Section scroll offset (kept: section ids stay linkable) --- *\/\n  .fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Clindamycin 150mg: Clindamycin for Fish with Fin Rot, Mouth Rot\u003cbr\u003eand Skin Ulcers in Freshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Cin (Fix Cin)\u003c\/strong\u003e is fish clindamycin in 150 mg capsules from Aqua Soma Labs, an antibacterial treatment for ornamental aquarium fish. Each capsule contains \u003cstrong\u003e150 mg of clindamycin\u003c\/strong\u003e in a dissolvable powder, and aquarists use it to help manage suspected bacterial problems such as fin and tail rot, mouth rot or cotton-mouth, skin ulcers, and slow-healing lesions in both freshwater and saltwater tanks. The standard aquarium amount is one 150 mg capsule per 10 gallons (38 L) of water, once every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eIf you used to buy Thomas Labs Fish Cin or Aqua-Cin, Fix Cin is the current replacement and uses the same clindamycin at the same strength. Aquarists reach for it when fish show fin and tail rot, mouth rot or cotton-mouth (often miscalled \"mouth fungus\"), bacterial dropsy, skin ulcers or lesions, swim bladder problems, or other suspected internal bacterial issues. This bottle provides 100 capsules with fresh expiration dates, enough for larger aquariums or repeat treatment. Hobbyists also search for it simply as fish clindamycin, or by the older Fish Aid clindamycin label.\u003c\/p\u003e\n\u003cp\u003eUse Fix Cin at the first signs of bacterial stress in fish. These are the signs aquarists most often link to bacterial stress:\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for ornamental aquarium fish only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish Symptoms to Watch For\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eClamped or frayed fins, fin and tail rot\u003c\/li\u003e\n\u003cli\u003eReddened areas or red streaking\u003c\/li\u003e\n\u003cli\u003eOpen sores, skin ulcers, or lesions\u003c\/li\u003e\n\u003cli\u003eCottony mouth damage or mouth rot (often miscalled \"mouth fungus\")\u003c\/li\u003e\n\u003cli\u003eListlessness or lethargy\u003c\/li\u003e\n\u003cli\u003ePersistent loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eTreating early, along with clean water and strong aeration, helps protect the rest of the tank while the affected fish recovers. If your display tank contains shrimp or snails, treat the fish in a separate hospital tank to reduce risk.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online\u003c\/strong\u003e and get same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Ships directly from our U.S. warehouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Cin vs Fix Cin: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Fish Cin or Aqua-Cin, here is what has changed and what remains the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Clindamycin Formula\u003c\/strong\u003e Fix Cin contains the same \u003cstrong\u003eClindamycin Hydrochloride 150 mg\u003c\/strong\u003e per capsule that Fish Cin (Thomas Labs) used. The strength and capsule format have not changed.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Maker\u003c\/strong\u003e Fix Cin is produced by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, a maker focused on fish and bird treatments. It replaces the discontinued Thomas Labs Fish Cin and Aqua-Cin product lines.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Capsule Form\u003c\/strong\u003e The capsule is the same dissolvable powder form that Fish Cin keepers know, so your routine stays the same.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003e100-Count Bottle\u003c\/strong\u003e Fix Cin comes in a \u003cstrong\u003e100-count\u003c\/strong\u003e bottle, a generous supply for larger aquariums, repeat treatment, or multi-tank keepers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Cin for Fish\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSupport for Common Bacterial Aquarium Problems\u003c\/h3\u003e\n\u003cp\u003eFix Cin is often chosen when bacterial problems show up as fin damage, mouth irritation, ulcers, or slow-healing wounds in ornamental fish.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eWorks in Freshwater and Saltwater Tanks\u003c\/h3\u003e\n\u003cp\u003eAquarists use Fix Cin in both freshwater and saltwater hospital tanks, so it fits a range of ornamental aquarium setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelpful for External Lesions and Wound-Type Issues\u003c\/h3\u003e\n\u003cp\u003eAquarists often reach for this clindamycin when they see redness, open sores, frayed fins, or recurring skin lesions that may be linked to bacterial stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSupport for Internal Bacterial Concerns\u003c\/h3\u003e\n\u003cp\u003eIt can be used in a treatment setup when fish show ongoing appetite loss, low activity, or digestive-type signs that can sometimes accompany internal bacterial infections, including deep tissue infections or swim bladder infections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 150 mg Clindamycin Capsules\u003c\/h3\u003e\n\u003cp\u003eEach capsule provides a fixed \u003cstrong\u003e150 mg of clindamycin\u003c\/strong\u003e, which makes it easier to plan treatment for both freshwater and saltwater aquariums.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e100 Capsules for Repeat Treatment and Larger Tanks\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e100-capsule\u003c\/strong\u003e bottle is practical for community tanks, repeat treatment, and keepers who maintain a dedicated quarantine system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHospital Tank Friendly to Limit Main-Tank Disruption\u003c\/h3\u003e\n\u003cp\u003eTreating in a separate hospital tank keeps the treatment where it is needed and lowers stress on the main aquarium. Monitor ammonia and aerate well during any treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Tank\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a hospital tank when possible to make treatment easier and help protect healthy tank mates. If you use chemical filtration (like activated carbon), remove it during treatment, and turn off UV sterilizers if present. Increase aeration in the treatment tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDose by Aquarium Water Volume\u003c\/h3\u003e\n\u003cp\u003eAdd \u003cstrong\u003eone capsule (150 mg)\u003c\/strong\u003e per \u003cstrong\u003e10 gallons (38 L)\u003c\/strong\u003e of aquarium water to be treated. For faster dispersal, many hobbyists pre-mix the capsule contents in a small cup of aquarium water first, then add it to the tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eRepeat Every 24 Hours\u003c\/h3\u003e\n\u003cp\u003eRepeat the dose \u003cstrong\u003eevery 24 hours\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003ePerform Partial Water Changes Between Doses\u003c\/h3\u003e\n\u003cp\u003ePerform a partial water change between treatments to support water quality. Monitor fish behavior and basic water parameters during treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eContinue for 5 to 10 Days\u003c\/h3\u003e\n\u003cp\u003eContinue treatment for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e, depending on infection severity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStop if There Is No Improvement by Day 5\u003c\/h3\u003e\n\u003cp\u003eIf no improvement is seen within \u003cstrong\u003e5 days\u003c\/strong\u003e, discontinue use and reassess the likely cause. Consider guidance from an aquatic veterinarian or fish health professional, especially if symptoms worsen.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eClear Harmless Yellow Tint After Treatment\u003c\/h3\u003e\n\u003cp\u003eTo remove harmless yellow discoloration, change \u003cstrong\u003e20%\u003c\/strong\u003e of the water and run a charcoal (activated carbon) filter until the water clears.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Cin Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eClindamycin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e150 mg capsules\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e150 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e300 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e450 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e600 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 825 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures follow the label-style guideline of one 150 mg capsule per 10 gallons, roughly 15 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 10 days, and round to the nearest practical capsule. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can take on a harmless yellow tint. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red areas stop spreading, fins start to hold, and appetite returns. If there is no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven as the fish improve, keep treating for the full recommended number of days so the infection does not return. Afterward, change 20% of the water and run activated carbon to clear the yellow tint and any leftover product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to track water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and mixing the dose.\u003c\/li\u003e\n\u003cli\u003eActivated carbon to run after treatment to clear the harmless yellow tint.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Antibacterial treatments can affect biological filtration in some setups, so test ammonia and nitrite and keep aeration high during treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Cin Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eFix Cin works by slowing the growth of certain bacteria, which gives the affected fish a chance to recover when treatment is paired with clean water and good care. How well it works depends on the bacteria involved and tank conditions, so it is best used when a bacterial infection is likely and alongside stable water quality.\u003c\/p\u003e\n\u003cp\u003eWhat's inside: each capsule contains 150 mg of clindamycin as a dissolvable powder. Standard ingredients in the capsule shell hold the powder together and keep it stable in storage. The full ingredient breakdown is not printed on the retail label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed on the label, Fix Cin (clindamycin) usually causes no problems in ornamental fish. As with any treatment, incorrect amounts, combining multiple treatments, or prolonged use can increase the risk of side effects and resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003ePossible Fish Reactions\u003c\/h3\u003e\n\u003cp\u003eTemporary stress or hiding behavior, mild lethargy, and reduced appetite during treatment. Some tanks may show temporary, harmless water discoloration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStop Treatment and Act Quickly If You Notice\u003c\/h3\u003e\n\u003cp\u003eRapid gill movement, loss of balance, gasping at the surface, rolling over, or fish lying on the bottom. Increase aeration and consider a partial water change.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSupport Water Quality\u003c\/h3\u003e\n\u003cp\u003eKeep aeration high, test ammonia and nitrite, and perform partial water changes as needed between doses.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFiltration Notes\u003c\/h3\u003e\n\u003cp\u003eRemove activated carbon (and other chemical media) and turn off UV sterilizers during treatment, as they may reduce effectiveness. After treatment, activated carbon can be used to help clear discoloration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eIf your display tank contains shrimp, snails, or other invertebrates, consider treating fish in a separate hospital tank when possible.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Warnings \u0026amp; Precautions\u003c\/h3\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFor Aquarium Use Only\u003c\/h3\u003e\n\u003cp\u003eIntended for ornamental aquarium fish only.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eNot for Food Fish\u003c\/h3\u003e\n\u003cp\u003eDo not use in animals raised for food.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eKeep Out of Reach\u003c\/h3\u003e\n\u003cp\u003eStore away from children and pets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStorage\u003c\/h3\u003e\n\u003cp\u003eKeep capsules in their original container in a cool, dry place at \u003cstrong\u003e59-86°F (15-30°C)\u003c\/strong\u003e, away from moisture and direct sunlight. Keep the bottle tightly closed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDiscontinue if No Improvement\u003c\/h3\u003e\n\u003cp\u003eIf no improvement is seen after \u003cstrong\u003e5 days\u003c\/strong\u003e, stop use and reassess the likely cause. Consider guidance from an aquatic veterinarian or fish health professional if symptoms worsen.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDo Not Mix Treatments\u003c\/h3\u003e\n\u003cp\u003eAvoid combining Fix Cin with other treatments unless advised by a professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers, and other suspected bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e A treatment for anaerobic bacterial and protozoal problems including Hexamita and hole-in-the-head in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections, and Mycoplasma in fish and birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in fish and birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment for a range of suspected bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for suspected bacterial infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers, and bacterial skin infections in ornamental fish and birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for suspected bacterial infections including fin rot, ulcers, columnaris, and septicemia in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat does clindamycin treat in fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIn aquarium fish, clindamycin is used for suspected bacterial problems such as fin and tail rot, mouth rot or cotton-mouth, skin ulcers, and slow-healing lesions. It acts against gram-positive and anaerobic bacteria, so it is a poor fit for parasites such as ich or flukes, for true fungal growth, or for viruses. Confirm that water quality is stable before deciding a problem is bacterial.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Cin the same as fish clindamycin or Fish Aid clindamycin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fix Cin is the clindamycin fish treatment that hobbyists search for as fish clindamycin, fish treatments clindamycin, or Fish Aid clindamycin. The earlier Thomas Labs Fish Cin and Aqua-Cin used the same clindamycin, 150 mg per capsule. Fix Cin from Aqua Soma Labs is the current version.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Cin, Aqua-Cin and Fix Cin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Cin was the product name used by Thomas Labs, and Aqua-Cin was another brand of the same capsule. Both have been discontinued. Fix Cin from Aqua Soma Labs is the current direct replacement, with the same clindamycin at 150 mg per capsule in the same capsule form. Only the brand name and the maker changed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is inside Fix Cin (Fish Cin)?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Cin contains clindamycin hydrochloride, 150 mg per capsule, supplied as a dissolvable powder inside the capsule. The rest of the capsule is the shell and standard ingredients that hold the powder together and keep it stable in storage. Fix Cin is made and labeled only for ornamental aquarium fish, not for animals raised for food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish clindamycin dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe standard fish clindamycin dosage is one 150 mg capsule per 10 gallons (38 L) of tank water, roughly 15 mg per gallon, once every 24 hours for 5 to 10 days, with a partial water change between doses. Dose by the water volume of your treatment tank, not by the number of fish, and scale carefully in tanks under 10 gallons. If there is no improvement after 5 days, stop and reassess the likely cause with an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs there a 300 mg fish clindamycin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Fish clindamycin is supplied as 150 mg capsules, and Fix Cin follows that standard, so there is no single 300 mg capsule in this line. The same is true of the 500 mg strength some aquarists look for. Dose by water volume instead of by capsule strength: one 150 mg capsule per 10 gallons (38 L) means a 20 gallon treatment tank takes two capsules and reaches 300 mg that way, and a 30 gallon tank takes three. Measuring the tank is more reliable than splitting or stacking capsules to hit an exact milligram figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Cin safe for saltwater fish, reef tanks, shrimp and snails?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Cin is used by both freshwater and saltwater keepers, but it belongs in a hospital tank rather than a display. Treatments like this can be hard on invertebrates, so shrimp, snails, crabs and corals should not share water with a dose. Treating separately also protects the biofilter and healthy tank mates, and makes dosing, observation and water-quality control easier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Cin treat fungal, parasitic, or viral problems?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Fix Cin targets certain bacterial infections and does not treat parasites, viruses, or true fungal infections. If you see \"cottony\" growth, confirm the likely cause first since mouth damage is often mislabeled as \"mouth fungus.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy clindamycin for fish? Do Walmart or PetSmart sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Cin, the current fish clindamycin, directly from Fine Pet Health in 100-count bottles of 150 mg capsules. General retailers such as Walmart, PetSmart, Petco, and Tractor Supply do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan I buy fish clindamycin on Amazon?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Cin is sold direct from Fine Pet Health rather than through Amazon. Ordering here means the bottle ships from our U.S. warehouse with a current expiration date and a known count of 100 capsules of 150 mg each. If you do come across fish clindamycin on a marketplace listing, check three things first: the strength should read 150 mg, the count should match what you are paying for, and the expiration date should be visible before checkout, because discontinued Thomas Labs Fish Cin and Aqua-Cin stock still circulates through resellers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"Default Title","offer_id":50744370331887,"sku":"929894","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-cin-clindamycin-150mg-100-count-fish-antibacterial.webp?v=1789229491"},{"product_id":"fish-doxy","title":"Fish Doxy (Fix Doxy) Doxycycline 100mg Fish Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: 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.fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection class=\"fph-section\" id=\"fph-intro\"\u003e\n\u003ch2\u003eFish Doxycycline 100mg: Doxycycline for Fish and Pet Birds with Fin Rot,\u003cbr\u003eColumnaris, Septicemia and Respiratory Infections\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Doxy (Fix Doxy)\u003c\/strong\u003e is fish doxycycline supplied in 100mg tablets for ornamental aquarium fish and non-food pet birds. Aquarists use it for bacterial infections such as fin and tail rot, columnaris, and septicemia in freshwater and saltwater tanks, at one 100 mg tablet per 15 gallons of water, every 24 hours for 5 to 10 days. It is also chosen for racing pigeons and other pet birds during respiratory infections, mycoplasmosis (mycoplasma), or suspected chlamydiosis (also known as parrot fever, psittacosis, or ornithosis).\u003c\/p\u003e\n\u003cp\u003eIf you used to buy the discontinued Thomas Labs Fish Doxy, Aqua Doxy, or older Bird Biotic, Fix Doxy is the online replacement. It supplies the same doxycycline strength in bottles of 30 or 60 tablets with fresh expiration dates, and it is a straightforward option when you need doxycycline for birds or a fish doxycycline product to buy online. Hobbyists also shorten the name to fish dox or bird doxy.\u003c\/p\u003e\n\u003cp\u003eUse Fix Doxy when you notice early signs of bacterial stress in your fish or pet birds. Common symptoms differ between species, so check the lists below to identify what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is intended for aquarium and ornamental fish and pet birds only. It is not for animals used for food.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eClamped or frayed fins (fin and tail rot)\u003c\/li\u003e\n\u003cli\u003eSlime disease, mouth fungus \/ mouth rot\u003c\/li\u003e\n\u003cli\u003eColumnaris (cotton wool disease)\u003c\/li\u003e\n\u003cli\u003eRed or cloudy patches on the body\u003c\/li\u003e\n\u003cli\u003eBacterial hemorrhagic septicemia\u003c\/li\u003e\n\u003cli\u003eGill disease, labored gill movement\u003c\/li\u003e\n\u003cli\u003eLoss of appetite, hiding behavior\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eRespiratory infections (sneezing, wheezing, nasal discharge)\u003c\/li\u003e\n\u003cli\u003eMycoplasmosis (mycoplasma)\u003c\/li\u003e\n\u003cli\u003eChlamydiosis \/ ornithosis \/ psittacosis (parrot fever)\u003c\/li\u003e\n\u003cli\u003ePasteurellosis (common in pigeons)\u003c\/li\u003e\n\u003cli\u003eFluffed-up feathers, lethargy, inactivity\u003c\/li\u003e\n\u003cli\u003eEye infections, persistent loss of appetite\u003c\/li\u003e\n\u003cli\u003eChanges in droppings or vocalization\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eAddressing potential bacterial issues early with doxycycline, together with good water quality and advice from an aquatic or avian professional when available, helps your fish and birds maintain a stable, healthy aquarium or aviary.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online and ship directly from our U.S. warehouse.\u003c\/strong\u003e Fix Doxy doxycycline 100 mg tablets are available to buy online with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-comparison\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Doxy vs Fix Doxy: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you used to buy Fish Doxy, Aqua Doxy, or Bird Biotic from Thomas Labs, here is what stayed the same and what is different with Fix Doxy from Aqua Soma Labs.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Doxycycline\u003c\/strong\u003e\u003cbr\u003eFix Doxy delivers the same \u003cstrong\u003edoxycycline hyclate 100 mg\u003c\/strong\u003e per tablet that was used in the original Fish Doxy and Bird Biotic products.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e\u003cbr\u003eFix Doxy is made by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, replacing Thomas Labs, which discontinued its Fish Doxy and Bird Biotic lines.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Tablet Form\u003c\/strong\u003e\u003cbr\u003e100 mg tablets with the same dosing style (1 tablet per 15 gallons), so switching from Fish Doxy to Fix Doxy requires no changes to your routine.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eUpdated Packaging \u0026amp; Labeling\u003c\/strong\u003e\u003cbr\u003eNew bottle design and labeling under the Fix brand, with the same doxycycline formula and fresh expiration dates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-benefits\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Doxy for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eTargets Common Bacterial Problems\u003c\/h3\u003e\n\u003cp\u003eHelps manage common bacterial problems such as fin and tail rot, columnaris, gill disease, septicemia, internal bacterial infections, and avian respiratory infections caused by certain Gram-positive and Gram-negative bacteria in both freshwater and saltwater aquariums.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMade in the United States\u003c\/h3\u003e\n\u003cp\u003eFix Doxy is manufactured by Aqua Soma Labs and ships from a U.S. warehouse with fresh expiration dates, so you receive a recently made product ready for your tank or aviary.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eOne Solution for Fish \u0026amp; Birds\u003c\/h3\u003e\n\u003cp\u003eFix Doxy is formulated for both ornamental aquarium fish and non-food pet birds, so one doxycycline product covers tanks and aviaries. Use it for individual treatment or a whole flock as appropriate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFixed 100 mg Tablets\u003c\/h3\u003e\n\u003cp\u003eEach tablet delivers a fixed \u003cstrong\u003e100 mg doxycycline\u003c\/strong\u003e amount. These fish doxycycline tablets make it easier to follow the charts and repeat treatments accurately across different tank volumes or bird sizes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFlexible Use in Tanks \u0026amp; Feed\u003c\/h3\u003e\n\u003cp\u003eTablets are water-soluble and easy to crush, so you can dissolve them in a hospital or quarantine tank, or mix them with food or drinking water as directed. This helps when you need to treat sensitive fish or birds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eAvailable in 30-Count and 60-Count Bottles\u003c\/h3\u003e\n\u003cp\u003eChoose a 30-count bottle for a single treatment or a 60-count bottle for larger tanks, multiple birds, or repeat treatments, so you always have doxycycline on hand when needed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirect Fish Doxy \u0026amp; Bird Biotic Replacement\u003c\/h3\u003e\n\u003cp\u003eFix Doxy replaces the discontinued Fish Doxy (Thomas Labs), Aqua Doxy, and Bird Biotic products. It delivers the same doxycycline hyclate 100 mg per tablet that hobbyists and breeders used before those lines were discontinued.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-dosage\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003ePrepare a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eFor fish, set up a hospital or quarantine tank with clean, dechlorinated water so you can treat without disturbing the main display tank or its biofilter. Any aquarium doxycycline treatment works best in a separate tank, so remove activated carbon, resins and UV sterilizers during dosing, as they can strip doxycycline from the water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eCalculate and Give the Dose\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFish:\u003c\/strong\u003e Check the dosing instructions on your Fix Doxy bottle. Label directions for 100 mg tablets typically call for \u003cstrong\u003e1 tablet (100 mg) per 15 gallons (57 L) of water\u003c\/strong\u003e, repeated every 24 hours for several days. Pre-dissolve the tablet in a small cup of tank water, then add it evenly around the treatment tank.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBirds:\u003c\/strong\u003e For companion birds, the amount is based on the bird's weight or the volume of treated drinking water. Crush the tablet and mix with soft food or a measured amount of drinking water \u003cstrong\u003eonly as directed\u003c\/strong\u003e on the packaging or by an avian veterinarian, making sure the bird receives the full intended amount.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMonitor Progress and Water Quality\u003c\/h3\u003e\n\u003cp\u003eWatch appetite, breathing, activity level and fin or feather condition every day. If symptoms worsen or no improvement is seen after several days, contact a veterinarian. For fish, perform partial water changes between doses if water quality declines, then re-dose for the new water volume. Continue treatment for the full number of days recommended on the label, usually around \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e, unless your vet advises otherwise, and never exceed label directions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Doxy Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e100 mg tablets per use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e15 gallons (57 L)\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e45 gallons (170 L)\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e60 gallons (227 L)\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e75 gallons (284 L)\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures follow the label directions of one dissolved tablet per 15 gallons of water. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours with a partial water change between doses, and round to the nearest practical tablet. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly discolored. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. The label says to discontinue use if no improvement is seen after 5 days, so if there is no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish the full number of days so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover doxycycline.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and for dissolving each tablet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Keep a few extra Fix Doxy tablets on hand so you always have them ready at the first sign of bacterial stress. A quarantine tank with a heater and sponge filter makes treatment faster and protects your main system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-mechanism\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Doxy Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eFix Doxy uses doxycycline hyclate 100 mg per tablet to help control certain Gram-positive and Gram-negative bacteria linked with fin and tail rot, mouth rot, columnaris, gill disease, septicemia, and avian respiratory infections. The tablets dissolve readily in aquarium water, and they can also be crushed and mixed with soft food or drinking water, which spreads the dose evenly through a treatment tank or across a flock.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc fph-acc--warn\" id=\"fph-safety\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhen used as directed, Fix Doxy usually causes no problems in ornamental fish and pet birds.\u003c\/strong\u003e As with any doxycycline product, incorrect amounts or prolonged use can increase the risk of side effects.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eDoxycycline based fish treatments may cause temporary stress or hiding behavior, mild water discoloration and reduced appetite during treatment. If fish show severe distress such as rapid gill movement, loss of balance or gasping at the surface, stop treatment and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eWhen doxycycline is given in food or drinking water, potential reactions can include decreased appetite, lethargy or changes in droppings if the amount is too high or the bird is sensitive. If your bird appears fluffed up, inactive or stops eating, discontinue use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Doxy in tanks that contain shrimp, snails, or other invertebrates, as strong treatments may harm them. Treat fish in a separate hospital tank whenever possible.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe Use in Your System\u003c\/h3\u003e\n\u003cp\u003eWhenever possible, treat fish in a hospital or quarantine tank, remove activated carbon and UV sterilizers and follow label directions for dose and duration. Do not mix Fix Doxy with other treatments unless advised by a veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant Safety Warning\u003c\/h3\u003e\n\u003cp\u003eFix Doxy is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals raised for food\u003c\/strong\u003e. Store the product in a cool, dry place away from children and pets. Always follow label directions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-shipping\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with rates and delivery times calculated at checkout. For full shipping details, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e A treatment for Hexamita, hole-in-the-head disease, and other protozoa-related problems in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in fish and non-food pet birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems, including skin and soft-tissue concerns, in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment used against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers, and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial problems, including fin rot, ulcers, columnaris, and septicemia, in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection class=\"fph-section\" id=\"fph-faq\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish doxy?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish doxy is a common name for doxycycline sold as an aquarium and aviary treatment. Fix Doxy is the current version: doxycycline hyclate 100 mg tablets for ornamental fish and non-food pet birds. It is used for bacterial problems like fin and tail rot, columnaris, gill disease, and septicemia, not fungi, viruses, or parasites such as ich and flukes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Doxy used for?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Doxy is a doxycycline hyclate 100 mg antibacterial treatment for ornamental aquarium fish and non-food pet birds. It is used when bacterial problems such as fin and tail rot, columnaris, gill disease, septicemia or respiratory infections in birds are suspected and a veterinarian or experienced aquatic or avian keeper recommends a doxycycline product. It does not treat parasitic, viral or fungal conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Doxy and Fix Doxy?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Doxy was a doxycycline 100 mg product made by Thomas Labs, which has been discontinued. Fix Doxy is a replacement made by Aqua Soma Labs using the same doxycycline hyclate 100 mg and the same tablet-based dosing style. The main difference is the manufacturer and packaging; the doxycycline, strength and general usage directions are the same.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Doxy a replacement for Bird Biotic?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Bird Biotic was a doxycycline hyclate 100 mg product from Thomas Labs intended for pigeons, pet birds, and exotic birds. Fix Doxy contains the same doxycycline at the same strength and can be used for non-food pet birds in the same way. Follow the Fix Doxy label directions for avian dosing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Doxy the same as Aqua Doxy?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eAqua Doxy was another doxycycline based fish treatment brand. Fix Doxy from Aqua Soma Labs uses the same doxycycline hyclate 100 mg and serves the same purpose. If you previously used Aqua Doxy for your aquarium or aviary, Fix Doxy is a suitable replacement with the same dosing strength.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Doxy available in 500 mg?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Doxy is only available as \u003cstrong\u003e100 mg tablets\u003c\/strong\u003e. If a higher total dose is needed, use multiple 100 mg tablets according to label directions or veterinary guidance. For example, a 500 mg total dose would require five 100 mg tablets. Always measure tank volume or bird body weight carefully before increasing the amount, and never exceed the dosing schedule printed on the Fix Doxy label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish doxycycline 100mg dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe fish doxycycline 100mg dosage guide is one 100 mg tablet per 15 gallons (57 L) of tank water, dosed every 24 hours for 5 to 10 days, with a partial water change between doses. A 30-gallon hospital tank takes 2 tablets. Discontinue use if there is no improvement after 5 days, and follow the bottle label or your aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Doxy be used for pigeons and other pet birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eDoxycycline has a long history of use in avian care, including for \u003cstrong\u003eracing pigeons, parrots, finches, canaries, and other companion birds\u003c\/strong\u003e. Fix Doxy delivers the same doxycycline hyclate 100 mg that was available in Bird Biotic products used by pigeon fanciers and bird breeders. The amount and duration must match the bird's species, size, and condition, so follow the Fix Doxy label directions for non-food pet birds or consult an avian veterinarian before treating. Fix Doxy should not be used for chickens, ducks, or other food-producing birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy doxycycline for fish? Do Walmart or Tractor Supply sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Doxy, the current fish doxycycline, directly from Fine Pet Health in 30-count and 60-count bottles. General retailers such as Walmart, Tractor Supply, PetSmart, and Petco do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" class=\"fph-faq-link\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan fish doxy be used for dogs, cats, or chickens?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003e\u003cspan class=\"fph-inline-warning\"\u003eNo.\u003c\/span\u003e Fix Doxy is labeled and intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. It is not appropriate for dogs, cats, or food-producing animals (including chickens, ducks, turkeys, or other poultry). For dogs and cats, doxycycline should be handled by a veterinarian who can recommend the correct amount and a suitable formulation for the species. Food-producing animals are subject to separate rules and must be treated under veterinary oversight so that withdrawal periods are observed. If your dog, cat, or food-producing animal needs antibacterial treatment, please consult a licensed veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"100-mg (30 count)","offer_id":50744370397423,"sku":"190064","price":44.99,"currency_code":"USD","in_stock":true},{"title":"100-mg (60 count)","offer_id":50744370430191,"sku":"748714","price":69.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-doxy-doxycycline-100mg-30-count-fish-antibacterial..webp?v=1789229493"},{"product_id":"fish-flex","title":"Fish Flex (Fix Flex) Cephalexin 500mg \u0026 250mg Fish Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    --fph-accent: #143583;\n    --fph-danger: #c62828;\n    --fph-warning: #f59e0b;\n    --fph-radius: 18px;\n    color: var(--fph-text);\n    font-size: clamp(15px, 1.05vw, 17px);\n    line-height: 1.75;\n    overflow-wrap: break-word;\n  }\n\n  .fph-product-copy,\n  .fph-product-copy * {\n    box-sizing: border-box;\n  }\n\n  .fph-product-copy .fph-section \u003e * + *,\n  .fph-product-copy .fph-acc-body \u003e * + *,\n  .fph-product-copy .fph-more-body \u003e * + * {\n    margin-top: clamp(14px, 2vw, 20px);\n  }\n\n  .fph-product-copy h2 {\n    margin: 0;\n    color: var(--fph-heading);\n    font-size: clamp(23px, 2.6vw, 33px);\n    line-height: 1.24;\n    letter-spacing: -0.02em;\n  }\n\n  .fph-product-copy h3 {\n    margin: 0 0 6px;\n    color: var(--fph-heading);\n    font-size: clamp(17px, 1.3vw, 20px);\n    line-height: 1.35;\n  }\n\n  .fph-product-copy p,\n  .fph-product-copy li {\n    margin: 0;\n  }\n\n  .fph-product-copy a {\n    color: var(--fph-accent);\n    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.fph-card-list,\n  .fph-product-copy .fph-info-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: clamp(12px, 2vw, 18px);\n    padding: 0;\n    list-style: none;\n  }\n\n  .fph-product-copy .fph-card-list li,\n  .fph-product-copy .fph-info-card {\n    min-width: 0;\n    padding: clamp(16px, 2vw, 22px);\n    border: 1px solid var(--fph-border);\n    border-radius: var(--fph-radius);\n    background: var(--fph-surface);\n  }\n\n  .fph-product-copy .fph-card-list li:last-child:nth-child(odd),\n  .fph-product-copy .fph-info-grid \u003e .fph-info-card:last-child:nth-child(odd) {\n    grid-column: 1 \/ -1;\n  }\n\n  \/* --- Symptom list inside info-card --- *\/\n  .fph-product-copy .fph-symptom-list {\n    margin: 8px 0 0;\n    padding-left: 1.2em;\n    list-style: disc;\n  }\n\n  .fph-product-copy .fph-symptom-list li {\n    margin-top: 4px;\n  }\n\n  \/* --- Step Lists --- *\/\n  .fph-product-copy .fph-step-list {\n    counter-reset: step;\n    display: grid;\n    gap: clamp(12px, 2vw, 18px);\n    padding: 0;\n    list-style: none;\n  }\n\n  .fph-product-copy .fph-step-list li {\n    position: relative;\n    padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 22px) clamp(68px, 7vw, 84px);\n    border: 1px solid var(--fph-border);\n    border-radius: var(--fph-radius);\n    background: #ffffff;\n  }\n\n  .fph-product-copy .fph-step-list li::before {\n    counter-increment: step;\n    content: counter(step);\n    position: absolute;\n    top: clamp(16px, 2vw, 20px);\n    left: clamp(16px, 2vw, 20px);\n    width: 36px;\n    height: 36px;\n    display: grid;\n    place-items: center;\n    border-radius: 50%;\n    background: var(--fph-accent);\n    color: #ffffff;\n    font-size: 15px;\n    font-weight: 700;\n    line-height: 1;\n  }\n\n  \/* --- FAQ Accordion --- *\/\n  .fph-product-copy .fph-faq-list {\n    display: grid;\n    gap: clamp(10px, 1.6vw, 14px);\n    padding: 0;\n    list-style: none;\n  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center;\n    justify-content: space-between;\n    gap: 14px;\n    min-height: 56px;\n    padding: clamp(14px, 2vw, 20px) clamp(16px, 2vw, 24px);\n    cursor: pointer;\n    list-style: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary h2 {\n    margin: 0;\n    font-size: clamp(19px, 2vw, 25px);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::after,\n  .fph-product-copy .fph-faq-item summary::after {\n    content: \"+\";\n    flex-shrink: 0;\n    width: 30px;\n    height: 30px;\n    display: grid;\n    place-items: center;\n    border-radius: 50%;\n    background: rgba(20, 53, 131, 0.10);\n    color: var(--fph-accent);\n    font-size: 20px;\n    font-weight: 400;\n    line-height: 1;\n  }\n\n  .fph-product-copy .fph-acc[open] \u003e summary::after,\n  .fph-product-copy .fph-faq-item[open] summary::after {\n    content: \"\\2212\";\n  }\n\n  .fph-product-copy .fph-acc[open] 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@media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Cephalexin 500mg \u0026amp; 250mg for Fin Rot, Skin Ulcers and Infected Wounds in Freshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Flex (Fix Flex)\u003c\/strong\u003e is a fish cephalexin 500mg and 250mg capsules for ornamental aquarium fish and non-food pet birds. Aquarists use it for bacterial infections such as fin and tail rot, skin ulcers, and infected wounds, at 250 mg per 10 gallons or 500 mg per 20 gallons, every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eOften called Fish Flex, Fin Flex or simply fishflex in the hobby community, this product is an online alternative to the discontinued Thomas Labs Fish Flex, Fish Flex Forte, Fish Aid Cephalexin, Aqua Ceph 500mg, Aqua Flex and FISHBIOTIC Cephalexin products. Aquarists and bird keepers also search for it as fish cephalexin, fish cephalexin 500mg, cephalexin for fish, or fish keflex. It helps manage common bacterial issues such as fin and tail rot, skin ulcers, infected wounds and lesions, red patches, pop-eye, and dropsy (pinecone disease) in freshwater and saltwater aquariums. Bird keepers also use it, under veterinary guidance, for conditions like bumblefoot, skin infections or joint infections in pigeons and other non-food pet birds.\u003c\/p\u003e\n\u003cp\u003eStart treatment early, at the first signs of bacterial stress. Those signs differ between fish and birds, so use the lists below to know what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFin and tail rot (frayed or ragged fins)\u003c\/li\u003e\n\u003cli\u003eSkin ulcers, open sores and infected wounds\u003c\/li\u003e\n\u003cli\u003eRed patches or cloudy patches on the body\u003c\/li\u003e\n\u003cli\u003ePop-eye (exophthalmia)\u003c\/li\u003e\n\u003cli\u003eDropsy (pinecone disease)\u003c\/li\u003e\n\u003cli\u003eLoss of appetite or listless behavior\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eBumblefoot (swollen foot pads)\u003c\/li\u003e\n\u003cli\u003eSkin infections or redness\u003c\/li\u003e\n\u003cli\u003eJoint infections or swelling\u003c\/li\u003e\n\u003cli\u003eRuffled feathers\u003c\/li\u003e\n\u003cli\u003eReduced activity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eFix Flex is formulated, labeled and sold exclusively as an antibacterial treatment for ornamental aquariums and pet birds.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online\u003c\/strong\u003e for same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Your order ships directly from our U.S. warehouse via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Flex vs Fix Flex: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Fish Flex, Fish Flex Forte, Aqua Ceph, Aqua Flex or FISHBIOTIC Cephalexin, here is what has changed and what remains the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Cephalexin\u003c\/strong\u003e The replacement contains the same \u003cstrong\u003ecephalexin\u003c\/strong\u003e per capsule that you relied on with Fish Flex and Aqua Ceph, and it targets the same bacteria.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e The new product is made by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, replacing the discontinued Thomas Labs line, and is manufactured in the United States.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Capsule Form\u003c\/strong\u003e It uses the same \u003cstrong\u003ecapsule\u003c\/strong\u003e format as the original Fish Flex, making it easy to open and dissolve the powder in aquarium water or mix with soft food for birds.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eAvailable in Two Strengths and Two Sizes\u003c\/strong\u003e Choose \u003cstrong\u003e250 mg\u003c\/strong\u003e or \u003cstrong\u003e500 mg\u003c\/strong\u003e capsules in bottles of \u003cstrong\u003e30 or 100\u003c\/strong\u003e, matching the flexibility that Fish Flex and Fish Flex Forte offered for different aquarium volumes and treatment plans.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Flex for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eBacterial Support for Fish and Birds\u003c\/h3\u003e\n\u003cp\u003eThis treatment provides cephalexin coverage for aquarium fish and pet birds. It helps manage common problems such as fin and tail rot, skin ulcers, infected wounds, red patches and early signs of bacterial stress when used as directed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMade in the United States\u003c\/h3\u003e\n\u003cp\u003eFix Flex is made in the United States by Aqua Soma Labs. Domestic production supports consistent capsule quality from batch to batch, which matters when you are treating fish or birds in a hospital tank or cage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eTwo Strengths to Match Your Tank\u003c\/h3\u003e\n\u003cp\u003eUse \u003cstrong\u003e250 mg\u003c\/strong\u003e capsules for smaller aquariums, hospital tanks or lightly stocked systems, and \u003cstrong\u003e500 mg\u003c\/strong\u003e capsules for larger volumes or when higher total amounts are needed, always following the label directions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent Capsules\u003c\/h3\u003e\n\u003cp\u003eEach capsule delivers a consistent amount of cephalexin, making it easier to scale treatment from a single quarantine tank up to larger community aquariums, lofts or aviaries without complicated calculations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eEasy to Use\u003c\/h3\u003e\n\u003cp\u003eThese capsules can be opened and the powder dissolved directly in aquarium water or mixed with soft food, providing flexible options for shy, stressed or hard-to-handle fish and birds while minimizing handling and extra stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eWorks in Freshwater, Saltwater \u0026amp; Aviary Setups\u003c\/h3\u003e\n\u003cp\u003eHobbyists reach for this treatment in both freshwater and marine systems, and as a convenient option for pigeons and other ornamental birds kept in lofts, cages or aviaries when an antibacterial treatment is appropriate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eGood for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eUsing this treatment in a separate hospital tank or treatment cage helps protect the main aquarium's biofilter and reduces unnecessary exposure of healthy tank mates or flock members while you focus treatment where it is needed most.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a dedicated hospital tank and, where practical, house birds needing treatment in a small treatment cage. This helps protect healthy tank mates or flock members and lets you control the amount more precisely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eChoose the Right Strength\u003c\/h3\u003e\n\u003cp\u003eThese cephalexin capsules are available in \u003cstrong\u003e250 mg\u003c\/strong\u003e and \u003cstrong\u003e500 mg\u003c\/strong\u003e strengths. Select the strength that matches your aquarium volume or your professional's advice, and follow the product label for the number of capsules and how often to use it. Do not increase the amount or shorten the intervals on your own.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eAdd one dissolved 250 mg dose per 10 gallons (38 L) of water. Open the capsule, stir the powder into a cup of aquarium water, then pour it evenly around the hospital tank. Repeat every 24 hours with a partial water change between treatments for 5 to 10 days, and discontinue use if there is no improvement after 5 days. See the chart below for common tank sizes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eOnly give this treatment to pigeons and other pet birds under the direction of an avian veterinarian. Your vet can advise you on the correct amount for the bird's weight, frequency and duration. Capsule contents may be mixed into soft food or drinking water exactly as instructed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMaintain Water Quality \u0026amp; Finish the Treatment\u003c\/h3\u003e\n\u003cp\u003ePerform partial water changes as needed between doses to keep ammonia and nitrite low and ensure good aeration in the hospital tank. Continue treatment for the full recommended number of days even if fish or birds appear better; stopping early can allow symptoms to return. If there is no improvement after several days, or if signs worsen, consult an aquatic or avian professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Flex Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCephalexin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e250 mg capsules\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e500 mg capsules\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003en\/a (use 250 mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e750 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e1 + one 250 mg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1375 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures follow the Fix Flex product label: add one dissolved 250 mg dose per 10 gallons (38 L) of water, repeat every 24 hours with a partial water change between treatments for 5 to 10 days, and discontinue use if there is no improvement after 5 days. Dose by the water volume of your treatment tank, not by the number of fish, and round to the nearest practical capsule. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. If there is no change by day 5, discontinue use and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish the full treatment so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover cephalexin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and measuring the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always quarantine infected fish and birds away from healthy companions during treatment to reduce stress and help prevent the spread of disease. A small, dedicated hospital tank with a heater, air stone and no substrate makes dosing and water changes easier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Flex Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eFix Flex supplies cephalexin at 250 mg or 500 mg per capsule. It works against a range of Gram-positive bacteria and some Gram-negative species that affect the skin, fins and soft tissue of fish and birds, helping to slow or stop their growth.\u003c\/p\u003e\n\u003cp\u003eEach capsule is a hard gelatin shell that holds the cephalexin powder, along with standard ingredients that hold the capsule together and help the contents disperse evenly when dissolved in aquarium water or mixed with soft food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed, this product usually causes no problems in ornamental fish and pet birds. As with any antibacterial treatment, incorrect amounts or prolonged use can increase the risk of side effects and bacterial resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eThis treatment may cause temporary stress or hiding behavior, mild water cloudiness and reduced appetite during treatment. If fish show severe distress such as rapid gill movement, loss of balance, gasping at the surface or lying on the bottom, stop treatment, improve aeration and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eWhen the treatment is given in food or drinking water, possible reactions include decreased appetite, loose or changed droppings and lethargy, especially if the amount is too high or the bird is sensitive. If your bird appears fluffed up, inactive or stops eating, discontinue use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use this product in display tanks that contain shrimp, snails or other invertebrates, as strong treatments of this kind may harm them or disrupt the tank ecosystem. Whenever possible, move affected fish to a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat fish in a hospital or quarantine tank whenever you can, remove activated carbon and turn off UV sterilizers during treatment, and monitor ammonia, nitrite and temperature closely. Do not mix this product with other treatments unless advised by a veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety warning\u003c\/h3\u003e\n\u003cp\u003eFix Flex is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. It is \u003cspan class=\"fph-inline-warning\"\u003enot for animals raised for food\u003c\/span\u003e. Store capsules in a cool, dry place away from direct sunlight and keep out of reach of children and pets. Always follow the directions on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e A treatment for Hexamita, hole-in-the-head disease, and other protozoa-related problems in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections, and Mycoplasma in fish and non-food pet birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in fish and non-food pet birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems, including skin and soft-tissue concerns, in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment used against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial problems, including fin rot, ulcers, columnaris, and septicemia, in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish flex?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish flex is a common name for cephalexin sold as an aquarium treatment. Fix Flex is the current version: cephalexin 250 mg and 500 mg capsules for ornamental fish and non-food pet birds. It is used for bacterial problems like fin and tail rot, skin ulcers, red patches, and infected wounds, not fungi, viruses, or parasites such as ich and flukes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish cephalexin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish cephalexin is a common name for cephalexin sold as an aquarium treatment. Fix Flex (sometimes typed fixflex) is the current version: fish cephalexin 500mg and 250mg capsules for ornamental fish and non-food pet birds. It treats bacterial problems like fin and tail rot, skin ulcers, red patches and dropsy, not fungi, viruses or parasites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fish Flex the same as fish cephalexin 500mg?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fish Flex was the older brand name, and it contains cephalexin, so fish cephalexin 500mg describes the same product. Fix Flex from Aqua Soma Labs supplies it in 250 mg and 500 mg capsules for ornamental fish and non-food pet birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Flex the same as Fish Flex or Aqua Ceph?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt is the same idea under a current label. Fish Flex, Fish Flex Forte, Aqua Ceph, Aqua Flex, and FISHBIOTIC Cephalexin were earlier cephalexin products for aquarium use, and Fix Flex carries the same cephalexin for the same problems. Follow the Fix Flex label for the amount and duration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Flex and Fish Flex Forte?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt comes down to strength. The original \u003cstrong\u003eThomas Labs Fish Flex\u003c\/strong\u003e was 250 mg per capsule, while \u003cstrong\u003eFish Flex Forte\u003c\/strong\u003e was 500 mg. \u003cstrong\u003eFix Flex\u003c\/strong\u003e covers both: choose the \u003cstrong\u003e250mg\u003c\/strong\u003e option for the standard strength, or the \u003cstrong\u003e500mg\u003c\/strong\u003e option for the Forte equivalent. The cephalexin and capsule format are the same either way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish cephalexin 500mg dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe fish cephalexin 500mg dosage guide is one 500 mg capsule per 20 gallons (76 L) of tank water, dosed every 24 hours for 5 to 10 days, with a partial water change between doses. For the 250 mg strength, use one capsule per 10 gallons (38 L). Discontinue use if there is no improvement after 5 days, and follow the bottle label or your aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Flex (Fish Flex) used for?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Flex (cephalexin 250\/500 mg) is an antibacterial treatment used by hobbyists to help manage bacterial problems such as fin and tail rot, skin ulcers, infected wounds, red patches and pop-eye in ornamental aquarium fish, and to support veterinarian-directed treatment of conditions like bumblefoot, skin infections or joint infections in pet birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan you still buy fish flex, or is it discontinued?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can still buy it. The original Thomas Labs Fish Flex and Fish Flex Forte lines were discontinued, but Fix Flex from Aqua Soma Labs is the current fish flex and is in stock in 250 mg and 500 mg strengths, in bottles of 30 or 100 capsules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy cephalexin for fish? Do Walmart or PetSmart sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Flex, the current fish cephalexin, directly from Fine Pet Health. General retailers such as Walmart, PetSmart, Petco, and Tractor Supply do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday, via USPS or UPS.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan fish flex be used for dogs or cats?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. \u003cstrong\u003eFix Flex is for aquarium fish and non-food pet birds only.\u003c\/strong\u003e It must not be used for dogs, cats or other mammals. If you suspect an infection in another animal, contact a veterinary professional instead of using fish treatments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"250-mg (30 Count)","offer_id":50744370495727,"sku":"838004","price":19.95,"currency_code":"USD","in_stock":true},{"title":"250-mg (100 Count)","offer_id":50744370528495,"sku":"793274","price":34.99,"currency_code":"USD","in_stock":true},{"title":"500-mg (30 Count)","offer_id":50744370561263,"sku":"428814","price":24.8,"currency_code":"USD","in_stock":true},{"title":"500-mg (100 Count)","offer_id":50744370594031,"sku":"026784","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/Fish-flex-cephalexin-250mg-30-count-fish-antibacterial..webp?v=1789229494"},{"product_id":"fish-mox","title":"Fish Mox (Fix Mox) Amoxicillin 500mg \u0026 250mg Fish Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    --fph-accent: #143583;\n    --fph-danger: #c62828;\n    --fph-warning: #f59e0b;\n    --fph-radius: 18px;\n    color: var(--fph-text);\n    font-size: clamp(15px, 1.05vw, 17px);\n    line-height: 1.75;\n    overflow-wrap: break-word;\n  }\n\n  .fph-product-copy,\n  .fph-product-copy * {\n    box-sizing: border-box;\n  }\n\n  .fph-product-copy .fph-section \u003e * + *,\n  .fph-product-copy .fph-acc-body \u003e * + *,\n  .fph-product-copy .fph-more-body \u003e * + * {\n    margin-top: clamp(14px, 2vw, 20px);\n  }\n\n  .fph-product-copy h2 {\n    margin: 0;\n    color: var(--fph-heading);\n    font-size: clamp(23px, 2.6vw, 33px);\n    line-height: 1.24;\n    letter-spacing: -0.02em;\n  }\n\n  .fph-product-copy h3 {\n    margin: 0 0 6px;\n    color: 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0.15s;\n  }\n\n  .fph-product-copy .fph-more \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-more \u003e summary:hover {\n    background: rgba(20, 53, 131, 0.12);\n  }\n\n  .fph-product-copy .fph-more \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: 2px;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary .fph-more-open,\n  .fph-product-copy .fph-more:not([open]) \u003e summary .fph-more-close {\n    display: none;\n  }\n\n  \/* open: summary moves below the revealed content *\/\n  .fph-product-copy .fph-more[open] {\n    display: flex;\n    flex-direction: column;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e .fph-more-body {\n    order: 1;\n  }\n\n    .fph-product-copy .fph-more[open] \u003e summary {\n    order: 2;\n    align-self: flex-start;\n    margin-top: clamp(16px, 2.4vw, 22px);\n  }\n\n  \/* --- Inline Warning --- *\/\n  .fph-product-copy .fph-inline-warning {\n    color: var(--fph-danger);\n    font-weight: 700;\n  }\n\n  \/* --- Section scroll offset (kept: section ids stay linkable) --- *\/\n  .fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Amoxicillin 500mg \u0026amp; 250mg for Fin Rot, Dropsy and Ulcers in Freshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Mox (Fix Mox)\u003c\/strong\u003e is a fish amoxicillin 500mg and 250mg capsules for ornamental aquarium fish and non-food pet birds. Aquarists use it for bacterial infections such as fin and tail rot, dropsy, and skin ulcers, at 250 mg per 10 gallons or 500 mg per 20 gallons, every 24 hours for 5 to 10 days. With an avian veterinarian's guidance, the same capsules can be part of an amoxicillin plan for problems such as crop infections and salmonella or paratyphoid in pigeons and other pet birds.\u003c\/p\u003e\n\u003cp\u003eFix Mox gives you a 250 mg or 500 mg strength, so you can match it to the job: a small hospital tank, a larger community aquarium, or, with veterinary input, a loft or aviary. It is the current replacement for the discontinued Thomas Labs Fish Mox (fishmox). The 250 mg option stands in for the original strength, and the 500 mg option, the fish amoxicillin 500mg strength, covers what aquarists knew as Fish Mox Forte and Aqua Mox. Stock ships from our United States warehouse with fresh expiration dates and clearly printed strengths, in bottles of 30 or 100 capsules.\u003c\/p\u003e\n\u003cp\u003eStart treatment early, at the first signs of bacterial stress. Those signs differ between fish and birds, so use the lists below to know what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFin and tail rot (frayed or rotting fins)\u003c\/li\u003e\n\u003cli\u003eDropsy (body swelling)\u003c\/li\u003e\n\u003cli\u003ePop-eye (bulging eyes)\u003c\/li\u003e\n\u003cli\u003eRed streaks or open sores on the body\u003c\/li\u003e\n\u003cli\u003eSkin ulcers and abscesses\u003c\/li\u003e\n\u003cli\u003eColumnaris and gill disease\u003c\/li\u003e\n\u003cli\u003eLethargy, rapid breathing, loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eCrop infections\u003c\/li\u003e\n\u003cli\u003eSuspected salmonella \/ paratyphoid\u003c\/li\u003e\n\u003cli\u003eFluffed-up feathers, lethargy or inactivity\u003c\/li\u003e\n\u003cli\u003eDecreased appetite\u003c\/li\u003e\n\u003cli\u003eLoose or changed droppings\u003c\/li\u003e\n\u003cli\u003eLabored or difficult breathing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor birds, only use Fix Mox when an avian veterinarian has recommended amoxicillin for a specific problem. Catching an infection early, paired with clean water and good housing, gives your fish and birds the best chance to recover.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online\u003c\/strong\u003e and enjoy same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Fix Mox ships directly from our United States warehouse via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Mox vs Fix Mox: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you used to buy Fish Mox, Fish Mox Forte, or Aqua Mox, those brands are now discontinued or hard to find. Fix Mox from Aqua Soma Labs uses the same amoxicillin at the same strengths and steps in as a direct replacement for aquarium use.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Amoxicillin Inside\u003c\/strong\u003e\u003cbr\u003eFish Mox and Fix Mox both contain amoxicillin (250 mg or 500 mg per capsule), what aquarists have relied on for years.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eUpdated Labeling \u0026amp; Packaging\u003c\/strong\u003e\u003cbr\u003eFix Mox carries clear, modern labeling, with usage guidance, the amoxicillin strength, and storage notes printed on the bottle.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Capsule Format\u003c\/strong\u003e\u003cbr\u003ePull-apart capsules that dissolve in tank water, matching the format aquarists knew from Thomas Labs Fish Mox or Aqua Mox.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFresh Stock \u0026amp; Current Expiration Dates\u003c\/strong\u003e\u003cbr\u003eEvery bottle ships with recent production and clearly printed expiration dates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Mox for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eCovers Common Fish Infections\u003c\/h3\u003e\n\u003cp\u003eAs an aquarium antibacterial treatment for fish tanks, amoxicillin is used against many of the bacteria behind dropsy, fin and tail rot, red streaks, gill disease, swim bladder infections, and skin ulcers, in both freshwater and saltwater tanks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHandles External and Internal Problems\u003c\/h3\u003e\n\u003cp\u003eUse it for outward signs like frayed fins, open sores, or red patches, and for internal infections such as hemorrhagic septicemia that bring swelling, lethargy, or loss of appetite. Treat affected fish in a hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFlexible 250 mg and 500 mg Strengths\u003c\/h3\u003e\n\u003cp\u003eFish amoxicillin in a 500 mg or 250 mg capsule lets you scale from a small quarantine tank to a large system. The fish amoxicillin 500mg option (Fix Mox 500 mg) suits larger tanks or the Forte-strength job, and the 250 mg option covers standard strength. A common guide is 250 mg per 10 gallons or 500 mg per 20 gallons, and an aquatic veterinarian can tailor it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eKeep a Bottle on Hand\u003c\/h3\u003e\n\u003cp\u003eBacterial problems move fast, so it helps to have Fix Mox ready before trouble starts. Keeping a bottle on the shelf, stored cool and dry, means you can begin treatment at the first sign of infection in your aquarium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eEasy to Prepare for Fish and Vet-Directed Birds\u003c\/h3\u003e\n\u003cp\u003eThe capsules pull apart, and the contents dissolve fast in tank water so the treatment reaches even shy or hiding fish. Under avian veterinary guidance, the same contents mix into soft food or water for birds with problems like crop infections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBuilt for Hospital and Quarantine Tanks\u003c\/h3\u003e\n\u003cp\u003eFix Mox does its best work in a separate hospital or quarantine tank. There you can pull carbon and UV, hold water quality steady, and watch the sick fish without treating healthy tank mates or sensitive invertebrates.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eA Modern Swap for Discontinued Brands\u003c\/h3\u003e\n\u003cp\u003eWhen the old Thomas Labs Fish Mox or Aqua Mox is unavailable, Fix Mox is the go-to replacement. Clear strength labels and fresh stock make it easy to match the dose to your tank or a vet-directed bird plan.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove sick fish to a dedicated hospital or quarantine tank before you dose. Take out the activated carbon and switch off UV sterilizers, since both pull amoxicillin from the water. A 20-25% water change before the first dose lowers stress and starts treatment on cleaner water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eFollow the label guide of \u003cstrong\u003e250 mg amoxicillin per 10 gallons (38 L)\u003c\/strong\u003e or \u003cstrong\u003e500 mg per 20 gallons (76 L)\u003c\/strong\u003e. Open the capsule, stir the powder into a cup of tank water, then pour it evenly around the treatment tank. Repeat every 24 hours for \u003cstrong\u003e5-10 days\u003c\/strong\u003e, with a partial water change between doses. If nothing improves after about 5 days, or fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eUse Fix Mox in pigeons and other non-food pet birds only when an avian veterinarian directs it. The vet sets the correct amount for the bird's weight, how often to give it, and how long to continue. Capsules are usually opened into soft food or drinking water so the bird takes the full amount, but follow the vet's exact instructions rather than guessing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMaintain Water Quality and Finish the Treatment\u003c\/h3\u003e\n\u003cp\u003eThrough treatment, keep an eye on ammonia, nitrite, and temperature, and keep aeration strong. Finish the full treatment unless a veterinarian says otherwise; stopping early lets symptoms come back. Afterward, run a partial water change and put activated carbon back in to clear out any leftover amoxicillin and help the tank settle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Mox Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eAmoxicillin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e250 mg capsules\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e500 mg capsules\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003en\/a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e750 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e1 + one 250 mg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1375 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures come from the label-style guideline of 250 mg per 10 gallons, roughly 25 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 10 days, and round to the nearest practical capsule. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. If there is no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish the full treatment so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover amoxicillin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and measuring the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Treat sick fish in a separate hospital tank rather than the main display whenever you can. It keeps your display biofilter and invertebrates safe while you focus the treatment where it is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Mox Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eEach Fix Mox capsule contains amoxicillin trihydrate, 250 mg or 500 mg. Amoxicillin is an antibacterial used against many Gram-positive and some Gram-negative bacteria, the kind behind fin and tail rot, skin ulcers, red streaks, and certain gill infections in ornamental fish.\u003c\/p\u003e\n\u003cp\u003eAlongside the amoxicillin, each capsule holds standard ingredients that hold the contents together and help them disperse properly in aquarium water, or in soft food for birds under veterinary guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eAt the right amount, Fix Mox usually causes no problems for fish or pet birds. The risk of side effects climbs with too much product, treatment that runs longer than needed, or treating an already stressed animal, and overuse feeds resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eAmoxicillin can cause short-term hiding, mild water cloudiness, and lower appetite during treatment. If a fish shows real distress, rapid gill movement, loss of balance, gasping at the surface, or lying on the bottom, stop, add clean dechlorinated water for better aeration, and call an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eMixed into food or water, amoxicillin may cause reduced appetite, loose or changed droppings, and lethargy, especially at too high an amount or in a sensitive bird. A fluffed-up, inactive bird, or one that struggles to breathe or stops eating, should stop treatment and see an avian veterinarian right away.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Mox in display tanks with shrimp, snails, or other invertebrates, since strong treatments can harm them and upset the tank. Move affected fish to a separate hospital or quarantine tank instead.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat in a hospital or quarantine tank where you can, pull activated carbon and switch off UV during treatment, and keep an eye on ammonia, nitrite, and temperature. Do not combine Fix Mox with other treatments unless a veterinarian advises it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety \u0026amp; storage\u003c\/h3\u003e\n\u003cp\u003eFix Mox is for \u003cstrong\u003eaquarium and ornamental fish and non-food pet birds only\u003c\/strong\u003e, and not for animals raised for food. If you are sensitive to penicillins, avoid contact with the capsule contents, wash your hands after handling, and wear gloves if needed. Store the capsules in their original container in a cool, dry place at \u003cstrong\u003e59-86°F (15-30°C)\u003c\/strong\u003e, out of moisture and sunlight, and out of reach of children and pets, with the lid closed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with rates and delivery times calculated at checkout. For full shipping details, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e A treatment for Hexamita, hole-in-the-head disease, and other protozoa-related problems in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections, and Mycoplasma in fish and non-food pet birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in fish and non-food pet birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems, including skin and soft-tissue concerns, in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment used against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers, and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial problems, including fin rot, ulcers, columnaris, and septicemia, in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish mox?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish mox is a common name for amoxicillin sold as an aquarium treatment. Fix Mox is the current version: amoxicillin 250 mg and 500 mg capsules for ornamental fish and non-food pet birds. It is used for bacterial problems like fin rot, dropsy, red streaks, and skin ulcers, not fungi, viruses, or parasites such as ich and flukes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish amoxicillin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish amoxicillin is amoxicillin formulated for ornamental aquarium fish. It is used against bacterial infections such as fin rot, skin ulcers, red streaks, and gill disease. Fix Mox is the current fish amoxicillin from Aqua Soma Labs, sold as fish amoxicillin 500mg and 250 mg capsules for freshwater and saltwater tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs fish mox the same as amoxicillin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes, in terms of what is inside. Each Fix Mox capsule holds amoxicillin trihydrate, 250 mg or 500 mg. What differs is the labeling: Fix Mox is made and sold only for ornamental aquarium fish and non-food pet birds, and not for animals raised for food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Mox the same as Fish Mox or Aqua Mox?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt is the same idea under a current label. Fish Mox, Fish Mox Forte, and Aqua Mox were earlier amoxicillin products for aquarium use, and Fix Mox carries the same amoxicillin for the same problems. Follow the Fix Mox label for the amount and duration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Mox and Fish Mox Forte?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt comes down to strength. The original \u003cstrong\u003eThomas Labs Fish Mox\u003c\/strong\u003e was 250 mg per capsule, while \u003cstrong\u003eFish Mox Forte\u003c\/strong\u003e was 500 mg. \u003cstrong\u003eFix Mox\u003c\/strong\u003e covers both: choose the \u003cstrong\u003e250mg\u003c\/strong\u003e option, the fish mox 250mg equivalent, for standard strength, or the \u003cstrong\u003e500mg\u003c\/strong\u003e option for the Forte equivalent. The ingredient and capsule format are the same either way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Mox the same as fish amoxicillin 500mg?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIn the 500 mg option, yes. That capsule holds 500 mg of amoxicillin, the strength often searched for as fish amoxicillin 500mg. The 250 mg option holds 250 mg. Same ingredient, same pull-apart capsule, so you pick the strength that fits your tank size or a vet-directed bird plan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish amoxicillin 500mg dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe fish amoxicillin 500mg dosage guide is one 500 mg capsule per 20 gallons (76 L) of tank water, dosed every 24 hours for 5 to 10 days, with a partial water change between doses. For the 250 mg strength, use one capsule per 10 gallons (38 L). Measure your treatment tank volume first, and follow the bottle label or your aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan you still buy fish mox, or is it discontinued?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can still buy it. The original Thomas Labs Fish Mox and Aqua Mox lines were discontinued, but Fix Mox from Aqua Soma Labs is the current fish mox and is in stock in 250 mg and 500 mg strengths, in bottles of 30 or 100 capsules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy fish mox? Do Walmart or Tractor Supply sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Mox, the current fish mox, directly from Fine Pet Health. General retailers such as Walmart, Tractor Supply, PetSmart, and Petco do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders leave our U.S. warehouse within one business day by USPS or UPS, with clear labels and current expiration dates.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan fish mox be used for dogs or cats?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. The label covers ornamental aquarium fish and non-food pet birds only, not dogs, cats, or other mammals. A dog or cat that needs amoxicillin should get a vet-recommended, species-specific product and amount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"250-mg (30 count)","offer_id":50744370626799,"sku":"456074","price":25.99,"currency_code":"USD","in_stock":true},{"title":"250-mg (100 count)","offer_id":50744370659567,"sku":"239134","price":29.99,"currency_code":"USD","in_stock":true},{"title":"500-mg (30 count)","offer_id":50744370692335,"sku":"208764","price":29.99,"currency_code":"USD","in_stock":true},{"title":"500-mg (100 count)","offer_id":50744370725103,"sku":"658534","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-mox-amoxicillin-250mg-30-count-fish-antibacterial..webp?v=1789229495"},{"product_id":"fish-pen","title":"Fish Penicillin 500mg (Fish Pen) Fix Pen Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    --fph-accent: #143583;\n    --fph-danger: #c62828;\n    --fph-warning: #f59e0b;\n    --fph-radius: 18px;\n    color: var(--fph-text);\n    font-size: clamp(15px, 1.05vw, 17px);\n    line-height: 1.75;\n    overflow-wrap: break-word;\n  }\n\n  .fph-product-copy,\n  .fph-product-copy * {\n    box-sizing: border-box;\n  }\n\n  .fph-product-copy .fph-section \u003e * + *,\n  .fph-product-copy .fph-acc-body \u003e * + *,\n  .fph-product-copy .fph-more-body \u003e * + * {\n    margin-top: clamp(14px, 2vw, 20px);\n  }\n\n  .fph-product-copy h2 {\n    margin: 0;\n    color: var(--fph-heading);\n    font-size: clamp(23px, 2.6vw, 33px);\n    line-height: 1.24;\n    letter-spacing: -0.02em;\n  }\n\n  .fph-product-copy h3 {\n    margin: 0 0 6px;\n    color: var(--fph-heading);\n   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var(--fph-danger);\n    font-weight: 700;\n  }\n\n  \/* --- Section scroll offset (kept: section ids stay linkable) --- *\/\n  .fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Figure \/ infographic --- *\/\n  .fph-product-copy figure.fph-figure {\n    margin: clamp(16px, 2.4vw, 22px) 0 0;\n    padding: clamp(14px, 2vw, 18px);\n    border: 1px solid var(--fph-border);\n    border-radius: var(--fph-radius);\n    background: var(--fph-surface);\n  }\n\n  .fph-product-copy figure.fph-figure svg {\n    display: block;\n    width: 100%;\n    height: auto;\n  }\n\n  .fph-product-copy figure.fph-figure figcaption {\n    margin-top: 10px;\n    font-size: 14px;\n    color: #475569;\n    text-align: center;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Penicillin 500mg: Penicillin for Fish and Pet Birds with Fin Rot,\u003cbr\u003ePop-Eye and Skin Ulcers\u003c\/h2\u003e\n\u003cp\u003eFish Pen (Fix Pen) is a fish penicillin 500mg tablets for ornamental aquarium\u003cbr\u003efish and non-food pet birds. Each tablet contains 500 mg of Penicillin V Potassium, made by Aqua Soma Labs in the United States, and aquarists use it for fin and tail rot, infected wounds, pop-eye and columnaris-type lesions where a bacterial cause is suspected, in both freshwater and saltwater tanks. The label amount is one 500 mg tablet per 20 gallons (76 L) of water, repeated every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eAquarists may know this product as Fish Pen, Fish Pen Forte, Aqua Pen or FISHBIOTIC Penicillin. Those were Thomas Labs brand names, and Fix Pen is the current replacement now that the Thomas Labs line is discontinued. Keepers usually reach for penicillin tablets for fish when they see fin rot, tail rot, infected wounds, pop-eye (bulging eyes) or columnaris-type lesions, sometimes called cotton-wool disease, where a bacterial cause is suspected.\u003c\/p\u003e\n\u003cp\u003eStart treatment early, at the first signs of a suspected bacterial problem. The signs are not the same for fish and birds, so use the lists below to know what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cp\u003ePenicillin V works on the cell walls of certain bacteria and can stop certain gram-positive bacteria from multiplying. Fix Pen is the fish penicillin 500 mg tablet many hobbyists use for fish tank infections, and the same tablets are used as penicillin for birds under avian veterinary guidance. It targets gram-positive and some gram-negative bacteria in ornamental aquarium use.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFin and tail rot (frayed or rotting fins)\u003c\/li\u003e\n\u003cli\u003eMouth rot and infected wounds\u003c\/li\u003e\n\u003cli\u003ePop-eye (bulging eyes) or cloudy eyes\u003c\/li\u003e\n\u003cli\u003eColumnaris-type lesions (cotton-wool look)\u003c\/li\u003e\n\u003cli\u003eOpen sores, ulcers or reddening of the skin\u003c\/li\u003e\n\u003cli\u003eReduced appetite, lethargy or hiding\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eRespiratory infections with labored breathing\u003c\/li\u003e\n\u003cli\u003eSoft tissue infections where a vet suspects bacteria\u003c\/li\u003e\n\u003cli\u003eFluffed-up feathers, lethargy or inactivity\u003c\/li\u003e\n\u003cli\u003eDecreased appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor birds, only reach for Fix Pen when an avian veterinarian has recommended penicillin for a specific problem. Catching an infection early, paired with clean water and good husbandry, gives your fish and birds the best chance to recover.\u003c\/p\u003e\n\u003cp\u003eHusbandry still does most of the work. Stable water and good feeding prevent more problems than any treatment can fix. Penicillin does nothing for viral issues, and using fish treatments like penicillin when they are not needed can reduce how well they work later.\u003c\/p\u003e\n\u003cp\u003eEach tablet contains 500 mg, and bottles come in 30 or 60 tablets. The 30-count suits a single hospital tank or occasional use; the 60-count fits multi-tank setups or aviary needs. You can buy Fix Pen online with fresh expiration dates and U.S. shipping.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online:\u003c\/strong\u003e in-stock orders placed before 1:30 p.m. CT, Monday through Friday, ship the same day from our U.S. warehouse by USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Pen Forte vs Fix Pen: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you used Thomas Labs Fish Pen, Fish Pen Forte, Aqua Pen or FISHBIOTIC Penicillin, here is what is the same and what is different:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Penicillin Formula\u003c\/strong\u003e Fix Pen contains the same 500 mg Penicillin V Potassium per tablet that you used in Fish Pen and Fish Pen Forte. The formula targets the same bacteria.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e Fix Pen is made by Aqua Soma Labs, which replaced the discontinued Thomas Labs line. Aqua Soma Labs manufactures it in the United States.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Tablet Form\u003c\/strong\u003e Fix Pen uses the same tablet format as the original Fish Pen, so it is easy to dissolve in aquarium water or crush for precise dosing in a hospital tank.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eAvailable in 30-Count and 60-Count Bottles\u003c\/strong\u003e Pick the size that fits your setup: a 30-count bottle for a single hospital tank or occasional use, or a 60-count bottle for larger collections, multi-tank operations or aviary needs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Pen for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eTargeted Gram-Positive Bacterial Coverage\u003c\/h3\u003e\n\u003cp\u003eA classic penicillin choice when a gram-positive bacterial component is suspected in ornamental fish, especially when the signs look like fin and tail rot, mouth rot, sores, pop-eye or cloudy eyes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMade in the USA with Fresh Dating\u003c\/h3\u003e\n\u003cp\u003eFix Pen is manufactured in the United States by Aqua Soma Labs and ships with fresh expiration dates, so you can keep a bottle on hand for your hospital tank and trust it when you need it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 500 mg Tablets\u003c\/h3\u003e\n\u003cp\u003eEach tablet delivers a reliable 500 mg dose of Penicillin V Potassium, so it is easy to scale from a single betta or quarantine tank to larger community aquariums.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eCommon Aquarium Use Cases\u003c\/h3\u003e\n\u003cp\u003eOften chosen when the goal is to target gram-positive and some gram-negative bacteria in ornamental fish. In aquarium care discussions, penicillin comes up for flexibacter-type issues, infected wounds and worsening fin damage when a bacterial component is suspected.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFreshwater and Saltwater Compatible\u003c\/h3\u003e\n\u003cp\u003eMade for ornamental aquarium use in both freshwater and saltwater setups when used as directed. A separate hospital tank is still recommended when possible to protect the main display system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eQuarantine-Friendly and Biofilter Aware\u003c\/h3\u003e\n\u003cp\u003ePenicillin may affect beneficial bacteria and can be risky for invertebrates like shrimp and snails. A separate treatment tank protects the main display and makes water-quality monitoring easier during treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIdeal for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eTreating in a separate hospital tank keeps the main aquarium's biofilter intact and limits exposure for healthy tank mates, so you can focus the treatment where it is needed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuick usage summary for fish:\u003c\/strong\u003e Use \u003cstrong\u003e1 tablet per 20 gallons (76 L)\u003c\/strong\u003e, repeat every 24 hours, and do a partial water change between doses. Continue for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e, and stop if you see no improvement after 5 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eWhen possible, treat fish in a hospital or quarantine tank. This limits exposure for healthy tank mates and makes it easier to watch results and water quality. Remove activated carbon and turn off UV sterilizers during treatment, since they can strip the penicillin from the water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eDissolve \u003cstrong\u003eone (1) 500 mg tablet\u003c\/strong\u003e in a small cup of aquarium water first, then add the dissolved dose for every \u003cstrong\u003e20 gallons (76 L)\u003c\/strong\u003e of water you are treating. Repeat every \u003cstrong\u003e24 hours\u003c\/strong\u003e, with a partial water change between treatments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDuration and When to Stop\u003c\/h3\u003e\n\u003cp\u003eContinue for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e. If you see no improvement after 5 days, stop and consider asking an aquatic professional about next steps. Finish the full recommended number of days even if the fish look better, since stopping early can let the problem come back.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMaintain Water Quality During Treatment\u003c\/h3\u003e\n\u003cp\u003eKeep strong aeration and watch your water parameters, especially ammonia and nitrite. Because penicillin may affect beneficial bacteria and can be risky for invertebrates like shrimp and snails, a separate treatment tank and close observation are strongly recommended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003ePet Birds (Under Veterinary Guidance Only)\u003c\/h3\u003e\n\u003cp\u003eFor non-food pet birds, use penicillin only under avian veterinary guidance for amount, frequency and duration. Your vet can advise the correct amount for the bird's weight and decide whether to treat a single bird or the whole flock.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Pen Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePenicillin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e500 mg tablets\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003ehalf a tablet (split)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e60 gallons (227 L)\u003c\/td\u003e\n\u003ctd\u003e1500 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e75 gallons (284 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1875 mg\u003c\/td\u003e\n\u003ctd\u003eabout 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese amounts follow the label guideline of one 500 mg tablet per 20 gallons (76 L), roughly 25 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 10 days, and make a partial water change between doses. Splitting a tablet by hand is only approximate, so for tanks under 20 gallons it is better to dissolve a whole tablet in a measured cup of tank water and add the matching fraction. Continuing for the full recommended number of days matters as much as picking the right treatment. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. If there is no change by day 5, or the fish look worse, stop and ask an aquatic professional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish the full treatment so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover penicillin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"fph-figure\"\u003e\u003csvg viewbox=\"0 0 760 185\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-labelledby=\"fixpen-tl-title fixpen-tl-desc\"\u003e\n\u003ctitle id=\"fixpen-tl-title\"\u003eFix Pen treatment timeline\u003c\/title\u003e\n\u003cdesc id=\"fixpen-tl-desc\"\u003eA typical Fix Pen treatment for aquarium fish runs 5 to 10 days. Days 1 to 2: set up and start treatment. Days 3 to 5: watch for response. Day 5: reassess and stop if there is no improvement. Days 5 to 10: finish the treatment.\u003c\/desc\u003e\n\u003ctext x=\"150\" y=\"34\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"15\" font-weight=\"700\" fill=\"#111827\"\u003eDays 1 to 2\u003c\/text\u003e\n\u003ctext x=\"150\" y=\"56\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"13\" fill=\"#475569\"\u003eSet up \u0026amp; start\u003c\/text\u003e\n\u003ctext x=\"370\" y=\"34\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"15\" font-weight=\"700\" fill=\"#111827\"\u003eDays 3 to 5\u003c\/text\u003e\n\u003ctext x=\"370\" y=\"56\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"13\" fill=\"#475569\"\u003eWatch for response\u003c\/text\u003e\n\u003ctext x=\"600\" y=\"34\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"15\" font-weight=\"700\" fill=\"#111827\"\u003eDays 5 to 10\u003c\/text\u003e\n\u003ctext x=\"600\" y=\"56\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"13\" fill=\"#475569\"\u003eFinish the treatment\u003c\/text\u003e\n\u003crect x=\"40\" y=\"86\" width=\"220\" height=\"16\" rx=\"8\" fill=\"#143583\"\u003e\u003c\/rect\u003e\n\u003crect x=\"262\" y=\"86\" width=\"216\" height=\"16\" rx=\"8\" fill=\"#4a6fb5\"\u003e\u003c\/rect\u003e\n\u003crect x=\"480\" y=\"86\" width=\"240\" height=\"16\" rx=\"8\" fill=\"#9fb3d9\"\u003e\u003c\/rect\u003e\n\u003ccircle cx=\"40\" cy=\"94\" r=\"10\" fill=\"#143583\" stroke=\"#ffffff\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\n\u003ccircle cx=\"480\" cy=\"94\" r=\"10\" fill=\"#f59e0b\" stroke=\"#ffffff\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\n\u003ccircle cx=\"720\" cy=\"94\" r=\"10\" fill=\"#9fb3d9\" stroke=\"#ffffff\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\n\u003ctext x=\"40\" y=\"132\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"14\" font-weight=\"700\" fill=\"#111827\"\u003eDay 1\u003c\/text\u003e\n\u003ctext x=\"480\" y=\"132\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"14\" font-weight=\"700\" fill=\"#111827\"\u003eDay 5\u003c\/text\u003e\n\u003ctext x=\"720\" y=\"132\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"14\" font-weight=\"700\" fill=\"#111827\"\u003eDay 10\u003c\/text\u003e\n\u003ctext x=\"480\" y=\"154\" text-anchor=\"middle\" font-family=\"inherit\" font-size=\"12\" fill=\"#c62828\"\u003ereassess; stop if no improvement\u003c\/text\u003e\n\u003c\/svg\u003e\n\u003cfigcaption\u003eFix Pen treatment timeline: a typical 5 to 10 day treatment for aquarium fish, with a reassessment point at day 5.\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and measuring the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Dose by the actual treated water volume, not the tank's advertised size, since gravel, decorations and equipment reduce usable volume. Daily observation and stable water quality matter as much as the dose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Pen Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eEach Fix Pen tablet contains 500 mg of Penicillin V Potassium, a penicillin that acts on the cell walls of certain bacteria. It helps control certain gram-positive bacteria, and some gram-negative bacteria, when used as directed in ornamental fish care.\u003c\/p\u003e\n\u003cp\u003eThe rest of each tablet is made up of standard ingredients that hold it together on the shelf and let it break apart and dissolve when you add it to aquarium water or a treatment setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed, Fix Pen usually causes no problems in ornamental fish. As with any treatment, unnecessary use, incorrect amounts or combining products can stress fish and reduce how well it works next time.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eSome fish may show short-term stress, reduced appetite or hiding during treatment. If you notice severe distress such as rapid gill movement, loss of balance, gasping at the surface or fish lying on the bottom, stop treatment, improve aeration, do a partial water change and seek aquatic veterinary or professional guidance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eFor non-food pet birds, use penicillin only under avian veterinary guidance. If your bird becomes unusually lethargic, stops eating or seems unwell, stop use and contact your avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Pen in display tanks that hold shrimp, snails or other invertebrates, since penicillin may harm them or disrupt the tank. Whenever possible, move affected fish to a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat fish in a hospital or quarantine tank whenever you can, remove activated carbon and turn off UV sterilizers during treatment, and watch ammonia, nitrite and temperature closely. Do not mix Fix Pen with other treatments unless a veterinarian advises it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety note\u003c\/h3\u003e\n\u003cp\u003eFix Pen is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. \u003cspan class=\"fph-inline-warning\"\u003eIt is not for animals raised for food.\u003c\/span\u003e Store tablets in a cool, dry place away from direct sunlight, and keep them out of reach of children and pets. Always follow the directions on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on in-stock orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e Targets anaerobic bacteria and protozoa, including Hexamita and hole-in-the-head, in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections and Mycoplasma in fish and birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease and avian respiratory concerns. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment commonly used for gram-positive bacterial infections, including skin and soft tissue concerns in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A combination treatment offering broad coverage against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers and bacterial skin infections in fish and birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial infections, including fin rot, ulcers, columnaris and septicemia in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Pen used for?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Pen is a fish penicillin tablet (500 mg) used to help manage suspected bacterial problems in ornamental aquarium fish, especially gram-positive infections such as fin rot, tail rot, infected wounds, pop-eye and columnaris-type lesions. For non-food pet birds, use penicillin only under avian veterinary guidance for usage and treatment decisions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is in each Fix Pen tablet?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eEach Fix Pen tablet contains \u003cstrong\u003e500 mg Penicillin V Potassium\u003c\/strong\u003e. Penicillin V works by interfering with bacterial cell wall formation, which helps control certain gram-positive bacteria when used as directed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Pen Forte, Aqua Pen and Fix Pen?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Pen, Fish Pen Forte, Aqua Pen and FISHBIOTIC Penicillin were Thomas Labs brand names for penicillin tablets sold for aquarium fish, and that line has been discontinued. Fix Pen from Aqua Soma Labs is the current replacement, with the same 500 mg Penicillin V Potassium per tablet in 30-count and 60-count bottles. The brand name and the maker changed; the tablet and its intended fish and bird use did not.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Pen the same as Fin Pen?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFin Pen is a separate brand of fish penicillin sold by other suppliers, not an earlier name for this product. Fix Pen is the Aqua Soma Labs version, at 500 mg of Penicillin V Potassium per tablet in 30-count and 60-count bottles. Both are penicillin tablets for aquarium fish, but strength and count differ between brands, so dose from the label on the bottle you actually have.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish penicillin dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe label amount is one 500 mg tablet per 20 gallons (76 L) of water, roughly 25 mg per gallon, repeated every 24 hours with a partial water change between doses. Continue for 5 to 10 days and stop if there is no improvement after 5 days. For tanks under 20 gallons, such as a betta hospital container, splitting a tablet by hand is only approximate, so dissolve a whole tablet in a measured cup of tank water and add the matching share. Dose by the water volume of your treatment tank, not by the number of fish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs there a fish penicillin 250 mg version?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Pen is sold only as a 500 mg tablet. Older hobby listings and other brands have offered penicillin for fish at 250 mg, which is why both strengths turn up in search results. If your plan calls for less than 500 mg, dissolve one Fix Pen tablet in a measured cup of tank water and add the matching share rather than looking for a 250 mg tablet in this line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan I use Fix Pen as penicillin for pet birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Pen contains Penicillin V Potassium, the same penicillin used in avian care, so it can serve as a penicillin for birds option. Bird amounts are different from fish amounts and depend on the species and body weight, so use bird penicillin only under the direction of an avian veterinarian who can confirm a bacterial infection and set the amount and duration. Fix Pen is intended for non-food pet birds, not poultry raised for meat or eggs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan I use Fix Pen for dogs, cats or chickens?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Pen is labeled for ornamental aquarium fish and non-food pet birds only. It is not formulated, tested or approved for dogs, cats, chickens or other mammals and food animals. If your dog or cat needs penicillin, a licensed veterinarian should recommend the correct product and amount for that species.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy penicillin for fish? Do Walmart or Tractor Supply sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Pen, the current fish penicillin, directly from Fine Pet Health in 30-count and 60-count bottles of 500 mg tablets. General retailers such as Walmart, Tractor Supply, PetSmart and Petco do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. In-stock orders ship from our U.S. warehouse via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Pen treat fungal, viral or parasitic infections?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Fix Pen is a penicillin that targets certain bacterial infections only. It does not work against fungi, viruses or parasites such as ich, flukes or worms. For fungal, parasitic or viral problems, work with an aquatic or avian veterinarian to choose the right treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"500-mg (30 Count)","offer_id":50744370790639,"sku":"641664","price":35.3,"currency_code":"USD","in_stock":true},{"title":"500-mg (60 Count)","offer_id":50744370823407,"sku":"811294","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-pen-penicillin-500mg-30-count-fish-antibacterial..webp?v=1789229498"},{"product_id":"fish-sulfa","title":"Fish Sulfa Forte (Fix Sulfa) SMZ\/TMP 960mg Fish Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    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.fph-product-copy .fph-more \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: 2px;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary .fph-more-open,\n  .fph-product-copy .fph-more:not([open]) \u003e summary .fph-more-close {\n    display: none;\n  }\n\n  \/* open: summary moves below the revealed content *\/\n  .fph-product-copy .fph-more[open] {\n    display: flex;\n    flex-direction: column;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e .fph-more-body {\n    order: 1;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary {\n    order: 2;\n    align-self: flex-start;\n    margin-top: clamp(16px, 2.4vw, 22px);\n  }\n\n  \/* --- Inline Warning --- *\/\n  .fph-product-copy .fph-inline-warning {\n    color: var(--fph-danger);\n    font-weight: 700;\n  }\n\n  \/* --- Section scroll offset (kept: section ids stay linkable) --- *\/\n  .fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Bactrim (SMZ\/TMP 960mg) for Fin Rot, Columnaris and Skin Ulcers\u003cbr\u003ein Freshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFish Sulfa Forte (Fix Sulfa)\u003c\/strong\u003e is fish bactrim in SMZ\/TMP 960 mg tablets for ornamental aquarium fish, pairing sulfamethoxazole 800 mg with trimethoprim 160 mg.\u003c\/span\u003e Aquarists use it for fin and tail rot, columnaris, skin ulcers, and pop-eye in both freshwater and saltwater aquariums, including problems that are often linked to gram-negative bacteria such as Aeromonas and Pseudomonas. The label amount is one 960 mg tablet per 40 gallons (151 L) of water, repeated every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eIn older hobby listings and aquarium forums, this SMZ\/TMP product also goes by Fish Sulfa, Fish Sulfa Forte, FISHBIOTIC SMZ\/TMP, and Aqua Sulfa. Fix Sulfa is the current-production replacement for the discontinued Thomas Labs Fish Sulfa Forte. Aquarists use this combination for fin and tail rot, columnaris (often presenting as cotton wool disease), skin sores and ulcer-like lesions, bacterial hemorrhagic septicemia, pop-eye (exophthalmia), cloudy eyes, and body slime issues linked to certain bacteria such as Aeromonas, Vibrio, or Streptococcus. Some keepers also search for it as fish bactrim or bactrim for fish, since Bactrim is another name for the sulfamethoxazole and trimethoprim combination.\u003c\/p\u003e\n\u003cp\u003eStart treatment at the first signs of bacterial stress, and treat affected fish in a hospital or quarantine tank whenever possible. Watch for the symptoms below.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is intended for aquarium and ornamental fish only. It is not for animals used for food.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cp\u003eSMZ\/TMP pairs two ingredients that work together to help slow the growth of certain bacteria. Used as directed for fish, sulfamethoxazole and trimethoprim work best alongside stable water parameters, strong aeration, and good husbandry. Fix Sulfa is the current-production version.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish Symptoms Aquarists Treat With Fix Sulfa\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eFin and tail rot (frayed or rotting fins)\u003c\/li\u003e\n\u003cli\u003eSkin sores, ulcer-like lesions, and red streaks\u003c\/li\u003e\n\u003cli\u003ePop-eye (bulging eyes) and cloudy eyes\u003c\/li\u003e\n\u003cli\u003eColumnaris, often with a cotton wool look\u003c\/li\u003e\n\u003cli\u003eBacterial hemorrhagic septicemia and body slime issues\u003c\/li\u003e\n\u003cli\u003eLethargy, rapid breathing, or loss of appetite that clean water does not fix\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003eFix Sulfa comes as a consistent \u003cstrong\u003e960 mg\u003c\/strong\u003e tablet that is easy to crush and dissolve. You can buy it online in bottles of \u003cstrong\u003e30 or 60 tablets\u003c\/strong\u003e with fresh expiration dates, so you can match the amount to a single quarantine tank or a multi-tank fish room.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder before 1:30 p.m. CT\u003c\/strong\u003e, Monday through Friday, for same-day dispatch. Fix Sulfa ships from our U.S. warehouse via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Sulfa Forte vs Fix Sulfa: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Fish Sulfa Forte, FISHBIOTIC SMZ\/TMP or Aqua Sulfa, here is what has changed and what remains the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Two Ingredients\u003c\/strong\u003e Fix Sulfa contains sulfamethoxazole 800 mg and trimethoprim 160 mg per tablet (SMZ\/TMP 960 mg), the same dual-ingredient formula found in legacy products like Thomas Labs Fish Sulfa Forte, FISHBIOTIC SMZ\/TMP, and Aqua Sulfa.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eUpdated Branding\u003c\/strong\u003e Aqua Soma Labs makes Fix Sulfa as a current-production replacement for the discontinued Thomas Labs Fish Sulfa Forte and other legacy SMZ\/TMP fish treatments. The two ingredients and intended use are the same.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Tablet Form\u003c\/strong\u003e Each tablet delivers a consistent 960 mg in a format that is easy to crush and dissolve for aquarium use, following the same scored-tablet approach aquarists are familiar with from Fish Sulfa Forte.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFlexible Bottle Sizes\u003c\/strong\u003e Available in 30-count and 60-count bottles with fresh expiration dates, giving hobbyists options for short treatments, quarantine setups, or multi-tank fish rooms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Sulfa for Fish\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eDual-Action SMZ\/TMP Combination\u003c\/h3\u003e\n\u003cp\u003eFix Sulfa pairs sulfamethoxazole and trimethoprim (SMZ\/TMP), a combination aquarists use to help manage certain bacterial issues in ornamental fish when used as directed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMade in the United States\u003c\/h3\u003e\n\u003cp\u003eFix Sulfa is made in the United States by Aqua Soma Labs as the current-production version of the discontinued Fish Sulfa Forte, with fresh expiration dates on every bottle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSupport for Common Aquarium Problems\u003c\/h3\u003e\n\u003cp\u003eAquarists commonly reach for fish sulfa tablets when dealing with symptoms associated with fin and tail rot, columnaris-type presentations, cotton wool disease, ulcer-like lesions, pop-eye, and other persistent bacterial signs in ornamental freshwater and saltwater fish.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelps With External and Internal Signs of Bacterial Stress\u003c\/h3\u003e\n\u003cp\u003eSMZ\/TMP tablets are often used in a hospital tank for visible skin sores, fin damage, and hemorrhagic septicemia, and in situations where fish show lethargy or reduced appetite alongside water-quality corrections and supportive care.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 960 mg Tablet Strength\u003c\/h3\u003e\n\u003cp\u003eEach tablet provides a consistent \u003cstrong\u003e960 mg\u003c\/strong\u003e format, making it easier to plan repeatable amounts across different tank sizes. Available in 30- or 60-tablet bottles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIntended for Ornamental Fish Use\u003c\/h3\u003e\n\u003cp\u003eFix Sulfa is intended for aquarium and ornamental fish use when used as directed, and the tablet format offers a straightforward option for hobbyists who prefer predictable, countable amounts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelpful for Quarantine and Hospital Tanks\u003c\/h3\u003e\n\u003cp\u003eTreating in a separate hospital or quarantine tank can help you observe fish more closely, control the amount more precisely, and reduce unnecessary exposure for healthy tank mates during treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eThese steps follow the Fix Sulfa 960 bottle label directions for SMZ\/TMP use in ornamental aquarium fish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuick Usage Summary:\u003c\/strong\u003e\u003cbr\u003eDissolve \u003cstrong\u003eone (1) dose (one tablet)\u003c\/strong\u003e and add it for every \u003cstrong\u003e40 gallons (151 L)\u003c\/strong\u003e of water to be treated. Repeat every 24 hours with a partial water change between treatments for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e. Discontinue use if no improvement is noted after 5 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBefore You Dose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eMeasure Water Volume\u003c\/h3\u003e\n\u003cp\u003eCalculate actual water volume (account for substrate, decor, and fill level).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse a Hospital Tank\u003c\/h3\u003e\n\u003cp\u003eUse a hospital\/quarantine tank when possible for better control and observation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eRemove Carbon and UV\u003c\/h3\u003e\n\u003cp\u003eRemove activated carbon and other chemical media; turn off UV sterilizers during treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBoost Aeration\u003c\/h3\u003e\n\u003cp\u003eIncrease aeration and surface agitation; keep temperature stable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eDissolve and Add the Dose\u003c\/h3\u003e\n\u003cp\u003eFully dissolve one (1) dose (one tablet) in a small cup of aquarium water, then add the dissolved dose to the treatment tank. Add \u003cstrong\u003eone tablet per 40 gallons (151 L)\u003c\/strong\u003e of water to be treated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eRepeat Every 24 Hours\u003c\/h3\u003e\n\u003cp\u003eRepeat every \u003cstrong\u003e24 hours\u003c\/strong\u003e. Perform a partial water change between treatments throughout the treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eComplete the Treatment and Watch for Progress\u003c\/h3\u003e\n\u003cp\u003eContinue treatment for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e. Watch appetite, swimming behavior, fin condition, and any signs of stress. Discontinue use if no improvement is noted after 5 days. If fish appear worse or show severe stress, stop treatment and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003ePost-Treatment Clean Up\u003c\/h3\u003e\n\u003cp\u003eAfter the treatment is complete, perform a partial water change and resume normal filtration. Replace activated carbon or chemical media if you removed it, and keep monitoring water parameters for several days to confirm stability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Sulfa Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFix Sulfa 960 amount\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eHow to measure\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e1\/4 tablet\u003c\/td\u003e\n\u003ctd\u003eSplit a scored tablet, or add 1\/4 of one dissolved tablet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e1\/2 tablet\u003c\/td\u003e\n\u003ctd\u003eSplit a scored tablet, or add 1\/2 of one dissolved tablet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1 tablet (label standard)\u003c\/td\u003e\n\u003ctd\u003eDissolve one whole tablet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e80 gallons (303 L)\u003c\/td\u003e\n\u003ctd\u003e2 tablets\u003c\/td\u003e\n\u003ctd\u003eDissolve two whole tablets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e120 gallons (454 L)\u003c\/td\u003e\n\u003ctd\u003e3 tablets\u003c\/td\u003e\n\u003ctd\u003eDissolve three whole tablets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe Fix Sulfa 960 label states one (1) dose (one tablet) per 40 gallons (151 L), which is about 24 mg of combined sulfamethoxazole and trimethoprim per gallon. The 40-gallon row is the exact label instruction; the other rows scale that same rate. For tanks under 40 gallons you can split a scored tablet, or dissolve one tablet in a measured cup of tank water and add the matching fraction for more accuracy. Dose by your treatment tank's water volume, not the number of fish, repeat once every 24 hours for 5 to 10 days, and follow the bottle label or your aquatic veterinarian over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eWatch for signs it is working: sores and red patches stop spreading, appetite starts to return, and breathing steadies. If there is no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish all the recommended days so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for a Treatment\u003c\/h3\u003e\n\u003cp\u003eA little setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and measuring the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Hospital tank treatment helps protect the display aquarium, keeps the amount consistent, and makes it easier to keep ammonia and nitrite at 0 during recovery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Sulfa Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eEach Fix Sulfa tablet pairs \u003cstrong\u003esulfamethoxazole 800 mg\u003c\/strong\u003e and \u003cstrong\u003etrimethoprim 160 mg\u003c\/strong\u003e (SMZ\/TMP). Dissolved and added to aquarium water as directed, the two ingredients work together to help slow the growth of certain bacteria.\u003c\/p\u003e\n\u003cp\u003eAlongside those two ingredients, each tablet includes standard ingredients that hold the tablet together and help it disperse properly in water. Aquarists use Fix Sulfa for fin and tail rot, ulcer-like lesions, columnaris, pop-eye, and other bacterial signs in ornamental freshwater and saltwater fish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIndividual fish can respond differently to treatment. For best results and safety, follow the label directions and monitor fish and water quality closely throughout the treatment.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003ePossible Side Effects in Fish\u003c\/h3\u003e\n\u003cp\u003eTemporary reduced appetite, mild lethargy or hiding behavior, and occasional water cloudiness during treatment. If fish show severe distress such as rapid gill movement, gasping at the surface, loss of balance, or lying on the bottom, stop treatment, increase aeration, and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStop Treatment If\u003c\/h3\u003e\n\u003cp\u003eFish show severe stress, rapid gill movement, gasping at the surface, loss of balance, or worsening symptoms. Increase aeration immediately and consult an aquatic veterinarian if signs do not stabilize.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eWater Quality and Biofilter Awareness\u003c\/h3\u003e\n\u003cp\u003eKeep aeration strong and monitor ammonia and nitrite closely during treatment. If parameters rise, perform partial water changes as needed to keep the treatment tank stable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFiltration During Treatment\u003c\/h3\u003e\n\u003cp\u003eRemove activated carbon and other chemical filtration media before dosing. Turn off UV sterilizers during treatment. Resume normal filtration after the treatment is complete.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates and Display Tanks\u003c\/h3\u003e\n\u003cp\u003eIf your system includes shrimp, snails, corals, or other invertebrates, treat fish in a separate hospital or quarantine tank whenever possible to reduce risk to the display ecosystem.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Warnings \u0026amp; Precautions\u003c\/h3\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAquarium Use Only\u003c\/h3\u003e\n\u003cp\u003eFix Sulfa is intended for ornamental aquarium fish only. \u003cspan class=\"fph-inline-warning\"\u003eIt is not for animals raised for food.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eNot for Food Fish\u003c\/h3\u003e\n\u003cp\u003eDo not use on fish raised for food. This product is made and labeled as an antibacterial treatment for ornamental aquarium fish only.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHandling Note\u003c\/h3\u003e\n\u003cp\u003eAvoid contact with the dissolved product, wash your hands after handling, and wear gloves if needed. Keep the tablet contents and dissolved product off skin and out of eyes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eKeep Out of Reach\u003c\/h3\u003e\n\u003cp\u003eStore Fix Sulfa out of reach of children and pets. Use it only as directed on the product label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStorage\u003c\/h3\u003e\n\u003cp\u003eKeep the container tightly closed and store in a cool, dry place, away from direct sunlight and moisture. Check the expiration date and do not use tablets past it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDiscontinue If No Improvement\u003c\/h3\u003e\n\u003cp\u003eIf no improvement is noted after 5 days of treatment, discontinue use as stated on the label and re-evaluate the diagnosis or seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDo Not Mix Treatments\u003c\/h3\u003e\n\u003cp\u003eAvoid combining Fix Sulfa with other treatments unless the product label explicitly allows it or an aquatic veterinarian advises it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers, and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e Targets anaerobic bacteria and protozoa including Hexamita and hole-in-the-head disease in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections, and Mycoplasma in ornamental fish and non-food pet birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in ornamental fish and non-food pet birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for bacterial skin and soft tissue concerns in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A penicillin treatment for bacterial infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers, and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for bacterial infections including fin rot, ulcers, columnaris, and septicemia in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish sulfa forte?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Sulfa Forte was a Thomas Labs SMZ\/TMP treatment (sulfamethoxazole and trimethoprim) for ornamental aquarium fish. Thomas Labs discontinued it, and Fix Sulfa by Aqua Soma Labs is the current-production version with the same two ingredients in a 960 mg tablet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Sulfa used for?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Sulfa (SMZ\/TMP) is used by aquarists to help manage certain bacterial issues in ornamental aquarium fish when used as directed. It is commonly chosen for symptoms associated with fin and tail rot, ulcer-like lesions, pop-eye, and other persistent bacterial signs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Sulfa the same as fish bactrim?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes, in the sense that Bactrim is another name for the same sulfamethoxazole and trimethoprim combination. Hobbyists searching for fish bactrim or bactrim for fish are looking for an SMZ\/TMP tablet, and Fix Sulfa supplies sulfamethoxazole 800 mg with trimethoprim 160 mg per 960 mg tablet. The two ingredients work together against certain bacteria, which is why the pairing is described as dual-action.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Fish Sulfa Forte, Aqua Sulfa and Fix Sulfa?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Sulfa Forte (Thomas Labs), FISHBIOTIC SMZ\/TMP and Aqua Sulfa are older names for the same sulfamethoxazole and trimethoprim tablet. Thomas Labs discontinued Fish Sulfa Forte, and Fix Sulfa by Aqua Soma Labs is the current-production version, with sulfamethoxazole 800 mg and trimethoprim 160 mg in the same 960 mg tablet format. The brand name and maker changed; the tablet and its intended use did not.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is inside each Fix Sulfa tablet?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eEach scored tablet contains \u003cstrong\u003esulfamethoxazole 800 mg\u003c\/strong\u003e and \u003cstrong\u003etrimethoprim 160 mg\u003c\/strong\u003e, which is where the 960 mg figure comes from. The rest of the tablet is standard ingredients that hold it together and help it disperse in water. Fix Sulfa is made and labeled only for ornamental aquarium fish, not for animals raised for food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish sulfa dosage per gallon?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe Fix Sulfa 960 label directs one (1) dose (one tablet) per 40 gallons (151 L) of water to be treated, about 24 mg of combined sulfamethoxazole and trimethoprim per gallon. Repeat every 24 hours with a partial water change between treatments for 5 to 10 days, and discontinue use if no improvement is noted after 5 days. Because one tablet covers 40 gallons, smaller tanks need a fraction: split a scored tablet, or dissolve one tablet in a measured cup of tank water and add the matching share. Dose by the water volume of your treatment tank, not by the number of fish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Sulfa the same as Triple Sulfa for fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Triple Sulfa aquarium products combine three different sulfa compounds and are usually sold as a powder for the whole tank. Fix Sulfa is a two-ingredient tablet: sulfamethoxazole paired with trimethoprim, which is the SMZ\/TMP combination. They are not interchangeable, so follow the directions for the specific product you actually have.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Sulfa be used for dogs or cats?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Sulfa is labeled for \u003cstrong\u003eornamental aquarium fish only\u003c\/strong\u003e. Veterinarians do use sulfamethoxazole and trimethoprim in dogs and cats, but the correct amount depends on the animal's weight and the format differs from an aquarium tablet. \u003cstrong\u003eDo not give Fix Sulfa to a dog, cat or horse without a licensed veterinarian\u003c\/strong\u003e confirming the diagnosis and the amount. It is also not for animals raised for food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy SMZ\/TMP fish tablets? Do Walmart or Tractor Supply sell them?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Sulfa, the current SMZ\/TMP fish tablet, directly from Fine Pet Health in 30-count and 60-count bottles of 960 mg tablets. General retailers such as Walmart, Tractor Supply, PetSmart and Petco do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Sulfa treat fungal, viral, or parasitic infections?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Sulfa (SMZ\/TMP) is an antibacterial treatment intended for certain bacterial issues. It is not designed for fungal, viral, or parasitic problems. If you suspect fungus, parasites, or mixed causes, consult an aquatic veterinarian or experienced aquarist to choose an appropriate treatment plan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"960-mg (30 Count)","offer_id":50744370856175,"sku":"405304","price":30.8,"currency_code":"USD","in_stock":true},{"title":"960-mg (60 Count)","offer_id":50744370888943,"sku":"322494","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-sulfa-forte-960mg-30-count-fish-antibacterial..webp?v=1789229499"},{"product_id":"fish-zithro","title":"Fish Zithro (Bird Zithro) Azithromycin 250mg Fish \u0026 Bird Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    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.fph-faq-answer {\n    padding: 0 clamp(16px, 2vw, 22px) clamp(14px, 2vw, 18px);\n    border-top: 1px solid var(--fph-border);\n  }\n\n  .fph-product-copy .fph-faq-answer p {\n    margin-top: clamp(12px, 1.6vw, 16px);\n  }\n\n  .fph-product-copy .fph-faq-answer a.fph-faq-link {\n    display: inline-block;\n    margin-top: 8px;\n    padding: 6px 0;\n    font-weight: 600;\n    text-decoration: none;\n    border-bottom: 1px solid var(--fph-accent);\n  }\n\n  .fph-product-copy .fph-faq-answer a.fph-faq-link:hover {\n    opacity: 0.8;\n  }\n\n  \/* --- Section accordions --- *\/\n  .fph-product-copy .fph-acc {\n    border: 1px solid var(--fph-border);\n    border-radius: var(--fph-radius);\n    background: var(--fph-surface);\n    overflow: hidden;\n  }\n\n  .fph-product-copy .fph-acc + .fph-acc {\n    margin-top: clamp(10px, 1.6vw, 14px);\n  }\n\n  .fph-product-copy .fph-acc--warn {\n    border-left: 4px solid var(--fph-warning);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary {\n    display: flex;\n    align-items: center;\n    justify-content: space-between;\n    gap: 14px;\n    min-height: 56px;\n    padding: clamp(14px, 2vw, 20px) clamp(16px, 2vw, 24px);\n    cursor: pointer;\n    list-style: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-acc \u003e summary h2 {\n    margin: 0;\n    font-size: clamp(19px, 2vw, 25px);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary::after,\n  .fph-product-copy .fph-faq-item summary::after {\n    content: \"+\";\n    flex-shrink: 0;\n    width: 30px;\n    height: 30px;\n    display: grid;\n    place-items: center;\n    border-radius: 50%;\n    background: rgba(20, 53, 131, 0.10);\n    color: var(--fph-accent);\n    font-size: 20px;\n    font-weight: 400;\n    line-height: 1;\n  }\n\n  .fph-product-copy .fph-acc[open] \u003e summary::after,\n  .fph-product-copy .fph-faq-item[open] summary::after {\n    content: \"\\2212\";\n  }\n\n  .fph-product-copy .fph-acc[open] \u003e summary {\n    border-bottom: 1px solid var(--fph-border);\n  }\n\n  .fph-product-copy .fph-acc \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: -2px;\n  }\n\n  .fph-product-copy .fph-acc-body {\n    padding: clamp(16px, 2.2vw, 24px);\n    background: #ffffff;\n  }\n\n  \/* --- See More toggle (intro) --- *\/\n  .fph-product-copy .fph-more \u003e summary {\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    min-height: 44px;\n    padding: 10px 24px;\n    border: 1px solid var(--fph-accent);\n    border-radius: 999px;\n    background: rgba(20, 53, 131, 0.06);\n    color: var(--fph-accent);\n    font-weight: 600;\n    cursor: pointer;\n    list-style: none;\n    transition: background 0.15s;\n  }\n\n  .fph-product-copy .fph-more \u003e summary::-webkit-details-marker {\n    display: none;\n  }\n\n  .fph-product-copy .fph-more \u003e summary:hover {\n    background: rgba(20, 53, 131, 0.12);\n  }\n\n  .fph-product-copy .fph-more \u003e summary:focus-visible {\n    outline: 2px solid var(--fph-accent);\n    outline-offset: 2px;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary .fph-more-open,\n  .fph-product-copy .fph-more:not([open]) \u003e summary .fph-more-close {\n    display: none;\n  }\n\n  \/* open: summary moves below the revealed content *\/\n  .fph-product-copy .fph-more[open] {\n    display: flex;\n    flex-direction: column;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e .fph-more-body {\n    order: 1;\n  }\n\n  .fph-product-copy .fph-more[open] \u003e summary {\n    order: 2;\n    align-self: flex-start;\n    margin-top: clamp(16px, 2.4vw, 22px);\n  }\n\n  \/* --- Inline Warning --- *\/\n  .fph-product-copy .fph-inline-warning {\n    color: var(--fph-danger);\n    font-weight: 700;\n  }\n\n  \/* --- Section scroll offset (kept: section ids stay linkable) --- *\/\n  .fph-product-copy [id] {\n    scroll-margin-top: 80px;\n  }\n\n  \/* --- Responsive --- *\/\n  @media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection id=\"fph-intro\" class=\"fph-section\"\u003e\n\u003ch2\u003eFish Azithromycin 250mg for Fin Rot, Columnaris and Gill Disease in\u003cbr\u003eFreshwater and Saltwater Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Zithro (Bird Zithro)\u003c\/strong\u003e supplies 250mg azithromycin per tablet and is an antibacterial treatment for ornamental aquarium fish and non-food pet birds. It is often chosen to help manage suspected bacterial problems such as fin and tail rot, columnaris, gill disease and early respiratory signs in pet birds. The standard fish amount is one 250 mg tablet per 10 gallons (38 L) of water, repeated every 24 hours for 5 to 7 days.\u003c\/p\u003e\n\u003cp\u003eOften called Bird Zithro or Fish Zithro in the hobby community, Fix Zithro is a reliable replacement for the discontinued Thomas Labs Bird Zithro, Fish Zithro and Aqua Zithro 250 mg products. Some keepers also search for it as fish zithromax or a fish z pack, since Zithromax and Z-Pak are other names for azithromycin.\u003c\/p\u003e\n\u003cp\u003eUse Fix Zithro when you notice early signs of bacterial stress. The warning signs differ between fish and birds, so the lists below split them by species.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cp\u003eThis azithromycin tablet from the Aqua Soma Labs Fix range is used for common problems such as fin and tail rot, columnaris, gill disease, bacterial hemorrhagic septicemia and other bacterial infections in freshwater and saltwater aquariums. Bird keepers also use it, under veterinary guidance, for mild upper respiratory tract infections (URI), suspected Mycoplasma issues, or conditions like chlamydia psittaci (psittacosis \/ parrot fever) in pigeons and other pet birds.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eClamped or frayed fins (fin and tail rot)\u003c\/li\u003e\n\u003cli\u003eRed or cloudy patches on the body\u003c\/li\u003e\n\u003cli\u003eFuzzy patches that suggest columnaris\u003c\/li\u003e\n\u003cli\u003ePop-eye (exophthalmia)\u003c\/li\u003e\n\u003cli\u003eGill irritation or labored gill movement\u003c\/li\u003e\n\u003cli\u003eSecondary infections around gill flukes\u003c\/li\u003e\n\u003cli\u003eListlessness or a persistent loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eSneezing and nasal discharge\u003c\/li\u003e\n\u003cli\u003eUpper respiratory tract infections (URI)\u003c\/li\u003e\n\u003cli\u003eSwollen eyes or sinus infections\u003c\/li\u003e\n\u003cli\u003eSuspected Mycoplasma issues\u003c\/li\u003e\n\u003cli\u003eSigns linked to chlamydia psittaci (parrot fever)\u003c\/li\u003e\n\u003cli\u003eRuffled feathers, fluffed-up posture\u003c\/li\u003e\n\u003cli\u003eReduced activity or loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eTreat bacterial issues early, keep the water clean, and ask an aquatic or avian professional when one is available. That combination gives your fish and birds the best chance to recover and keeps the aquarium or aviary stable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFix Zithro\u003c\/strong\u003e from Aqua Soma Labs is available to buy online in bottles of \u003cstrong\u003e12 or 30 tablets\u003c\/strong\u003e with fresh expiration dates. This gives hobbyists flexible options, whether they maintain a single hospital tank, multiple community aquariums, or need flock treatment and loft management for a busy aviary.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online\u003c\/strong\u003e for same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Fix Zithro ships directly from our U.S. warehouse via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails id=\"fph-comparison\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBird Zithro vs Fix Zithro: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Bird Zithro, Fish Zithro or Aqua Zithro, here is what has changed and what remains the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Azithromycin, Same Strength\u003c\/strong\u003e Fix Zithro contains the same \u003cstrong\u003e250 mg azithromycin\u003c\/strong\u003e per tablet that you relied on with Bird Zithro and Aqua Zithro. The same formula targets the same bacteria.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e Fix Zithro is made by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, replacing the discontinued Thomas Labs line. Aqua Soma Labs manufactures in the United States under strict quality-control standards.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Tablet Form\u003c\/strong\u003e Fix Zithro uses the same crushable \u003cstrong\u003etablet\u003c\/strong\u003e format as the original Bird Zithro, making it easy to dissolve in aquarium water or mix with soft food for birds.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eAvailable in 12-Count and 30-Count Bottles\u003c\/strong\u003e Choose the size that fits your setup: a 12-count bottle for a single hospital tank or occasional use, or a 30-count bottle for larger collections, multi-tank operations or aviary flock management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-benefits\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Zithro for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eBacterial Support for Fish \u0026amp; Birds\u003c\/h3\u003e\n\u003cp\u003eFix Zithro provides azithromycin coverage for ornamental fish and non-food pet birds. It helps manage common problems such as fin and tail rot, columnaris, gill disease, and early respiratory signs or the ornithosis complex in birds when used as directed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eReady to Use Promptly\u003c\/h3\u003e\n\u003cp\u003eKeep Fix Zithro on hand so you can begin treatment as soon as you notice early signs of bacterial stress. For pet birds, professional veterinary guidance is still strongly recommended to set the correct amount and duration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelps With Internal and External Infections\u003c\/h3\u003e\n\u003cp\u003eAzithromycin in Fix Zithro can be used for skin lesions, ulcers, fin damage and internal infections in a hospital tank, as well as part of a treatment plan for mild respiratory or Mycoplasma-related concerns in pet birds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 250 mg Tablets\u003c\/h3\u003e\n\u003cp\u003eEach tablet delivers a consistent \u003cstrong\u003e250 mg\u003c\/strong\u003e of azithromycin, making it easier to scale treatment from a single betta or quarantine tank up to larger community aquariums, lofts or aviaries without complicated calculations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eEasy to Administer\u003c\/h3\u003e\n\u003cp\u003eThese crushable tablets are easy to mix and can be dissolved directly in aquarium water or mixed with soft food, providing flexible options for shy, stressed or hard-to-handle fish and birds while minimizing handling and extra stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eVersatile for Freshwater, Saltwater \u0026amp; Aviary Setups\u003c\/h3\u003e\n\u003cp\u003eHobbyists reach for Fix Zithro as their trusted choice in both freshwater and marine systems, and as a convenient option for pigeons and other ornamental birds kept in lofts, cages or aviaries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIdeal for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eUsing Fix Zithro in a separate hospital tank or treatment cage helps protect the main aquarium's biofilter and reduces unnecessary exposure of healthy tank mates or flock members while you focus treatment where it is needed most.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-dosage\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a dedicated hospital tank and, where practical, house birds needing treatment in a small treatment cage. This helps protect healthy tank mates or flock members and lets you control dosing more precisely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eDissolve \u003cstrong\u003eone 250 mg tablet per 10 gallons (38 L)\u003c\/strong\u003e of water in the hospital tank. Mix the tablet in a small cup of aquarium water first, then distribute it evenly around the tank. Repeat the dose every 24 hours for \u003cstrong\u003e5 to 7 days\u003c\/strong\u003e while closely monitoring water quality and fish behavior. This is the standard amount for fish unless your aquatic veterinarian advises otherwise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eOnly administer Fix Zithro to pigeons and other pet birds under the direction of an avian veterinarian. Your vet can advise you on the correct amount for the bird's weight, frequency and duration. Tablets may be given whole, split, or crushed and mixed into soft food or drinking water exactly as instructed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMaintain Water Quality \u0026amp; Finish the Treatment\u003c\/h3\u003e\n\u003cp\u003ePerform partial water changes as needed between doses to keep ammonia and nitrite low and ensure good aeration in the hospital tank. Continue treatment for the full recommended number of days even if fish or birds appear better; stopping early can allow symptoms to return. If there is no improvement after several days, or if signs worsen, consult an aquatic or avian professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Zithro Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eAzithromycin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e250 mg tablets\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e750 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1375 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese numbers follow the label guideline of one 250 mg tablet per 10 gallons, about 25 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 7 days, and round to the nearest practical tablet. Split a tablet for tanks under 10 gallons. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eAmounts for Pet Birds\u003c\/h3\u003e\n\u003cp\u003eBirds are given an amount based on body weight, not by water volume, so there is no single chart the way there is for aquariums. The right amount depends on the species, the bird's weight and the specific infection. An avian veterinarian sets the amount, how often to give it, and how long to continue. Crush and mix the tablet into soft food or drinking water exactly as your vet directs, and do not estimate avian amounts on your own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. That is normal at the start. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eWatch for signs it is working: fin damage and red patches stop spreading, appetite returns, and breathing steadies. If nothing changes by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 7\u003c\/h3\u003e\n\u003cp\u003eEven once the fish improve, finish the full treatment so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover azithromycin from the water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA bit of setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and for mixing the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always quarantine infected fish and birds away from healthy companions during treatment to reduce stress and help prevent the spread of disease. A small, dedicated hospital tank with a heater, air stone and no substrate makes dosing and water changes easier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-mechanism\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Zithro Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eAzithromycin works to help slow or stop the growth of certain bacteria in the gills, skin and respiratory tract. Used as directed in fish or birds, it works best alongside good husbandry, clean water and appropriate nutrition.\u003c\/p\u003e\n\u003cp\u003eThe rest of each tablet is made up of standard ingredients that hold the tablet together, keep the azithromycin stable on the shelf, and let the tablet disperse and dissolve when added to aquarium water or mixed with soft food.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-safety\" class=\"fph-acc fph-acc--warn\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed, Fix Zithro usually causes no problems in ornamental fish and non-food pet birds. As with any azithromycin product, incorrect amounts or prolonged use can increase the risk of side effects and resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eAzithromycin-based fish treatments may cause temporary stress or hiding behavior, mild water cloudiness and reduced appetite during treatment. If fish show severe distress such as rapid gill movement, loss of balance, gasping at the surface or lying on the bottom, stop treatment, improve aeration and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eWhen azithromycin is given in food or drinking water, possible reactions include decreased appetite, loose or changed droppings and lethargy, especially if the amount is too high or the bird is sensitive. If your bird appears fluffed up, inactive or stops eating, discontinue use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Zithro in display tanks that contain shrimp, snails or other invertebrates, as strong antibacterial treatments may harm them or disrupt the tank ecosystem. Whenever possible, move affected fish to a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat fish in a hospital or quarantine tank whenever you can, remove activated carbon and turn off UV sterilizers during treatment, and monitor ammonia, nitrite and temperature closely. Do not mix Fix Zithro with other antibacterial treatments unless advised by a veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety warning\u003c\/h3\u003e\n\u003cp\u003eFix Zithro is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e, and not for animals raised for food. Store tablets in a cool, dry place away from direct sunlight and keep out of reach of children and pets. Always follow the directions on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails id=\"fph-shipping\" class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e Targets anaerobic bacteria and protozoa including Hexamita and hole-in-the-head disease in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections and Mycoplasma in fish and birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial infections, including skin and soft tissue concerns in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment for a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial infections including fin rot, ulcers, columnaris and septicemia in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection id=\"fph-faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Zithro (Bird Zithro) used for in fish and birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zithro (azithromycin 250 mg) is an antibacterial treatment used by hobbyists to help manage bacterial issues such as fin and tail rot, columnaris or gill disease in ornamental aquarium fish, and to support veterinarian-directed treatment of mild respiratory or Mycoplasma-related problems in non-food pet birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat does azithromycin treat in fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIn aquarium fish, azithromycin is mainly used for bacterial problems such as fin and tail rot, columnaris, gill disease, and ulcers, in both freshwater and saltwater tanks. It works against certain bacteria affecting the gills, skin and respiratory tract. For non-food pet birds, azithromycin is used under avian veterinary guidance for respiratory and Mycoplasma-related concerns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Bird Zithro and Fix Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eBird Zithro was the brand name used by Thomas Labs for their azithromycin 250 mg tablets. After Thomas Labs discontinued the product, Aqua Soma Labs introduced Fix Zithro as a direct replacement. Fix Zithro contains the same 250 mg azithromycin per tablet, uses the same crushable tablet format, and is intended for the same ornamental fish and pet bird applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zithro the same as Fish Zithro or Aqua Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fish Zithro and Aqua Zithro were earlier names for azithromycin 250 mg products in the hobby, alongside Thomas Labs Bird Zithro. Fix Zithro from Aqua Soma Labs is the current direct replacement, with the same 250 mg azithromycin per tablet and the same 12-count and 30-count bottle sizes. Product names and packaging have changed, but the tablet and its intended fish and bird use remain the same.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs azithromycin for birds the same as fish azithromycin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eSame azithromycin. Fix Zithro gives you 250 mg azithromycin per tablet for both ornamental fish and non-food pet birds. What changes is the amount: fish go by tank volume, birds go by body weight, and a bird should only be treated when an avian vet has set the amount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish azithromycin dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe standard fish azithromycin dosage is one 250 mg tablet per 10 gallons (38 L) of tank water, about 25 mg per gallon, dosed every 24 hours for 5 to 7 days with partial water changes between doses. For tanks under 10 gallons, split a tablet to match the actual water volume. Birds are different: an avian veterinarian sets the amount by body weight, so do not estimate bird amounts from the aquarium chart.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs fish azithromycin available in 500 mg?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zithro comes as \u003cstrong\u003e250 mg tablets\u003c\/strong\u003e only. If you need 500 mg total, use two 250 mg tablets per the label directions or your veterinarian's guidance. Measure the tank volume or the bird's body weight first, and do not go past the schedule on the label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Zithro be used for racing pigeons?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003ePigeon keepers use azithromycin under veterinary guidance for respiratory and Mycoplasma-related concerns in racing and show pigeons. Fix Zithro provides the same 250 mg azithromycin per tablet found in older Bird Zithro products that were widely used in loft management. Always consult an avian vet for the correct amount and schedule before treating pigeons. Fix Zithro is also not for chickens, ducks, or other food-producing birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy azithromycin for fish? Do Walmart or PetSmart sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Zithro, the current fish and bird azithromycin, directly from Fine Pet Health in 12-count and 30-count bottles of 250 mg tablets. General retailers such as Walmart, PetSmart, Petco, and Tractor Supply do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday.\u003c\/p\u003e\n\u003ca class=\"fph-faq-link\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" rel=\"noopener\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Zithro treat fungal, viral or parasitic infections?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Fix Zithro is an azithromycin antibacterial treatment for fish and birds that targets certain bacterial infections only. It is not effective against fungi, viruses or parasites such as ich, flukes or worms. For fungal, parasitic or viral problems, work with an aquatic or avian veterinarian to choose an appropriate treatment instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"250-mg (12 Count)","offer_id":50744371020015,"sku":"434604","price":43.99,"currency_code":"USD","in_stock":true},{"title":"250-mg (30 Count)","offer_id":50744371052783,"sku":"218534","price":75.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-zithro-azithromycin-250mg-12-count-fish-antibacterial.webp?v=1789229501"},{"product_id":"fish-zole","title":"Fish Zole (Fix Zole) Metronidazole 500mg \u0026 250mg Fish Antibacterial","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: 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@media (max-width: 989px) {\n    .fph-product-copy .fph-card-list,\n    .fph-product-copy .fph-info-grid {\n      grid-template-columns: 1fr;\n    }\n  }\n\n  @media (max-width: 767px) {\n    .fph-product-copy {\n      font-size: 15px;\n      line-height: 1.68;\n    }\n\n    .fph-product-copy h2 {\n      font-size: clamp(22px, 7vw, 28px);\n    }\n\n    .fph-product-copy .fph-step-list li {\n      padding: 64px 16px 16px;\n    }\n\n    .fph-product-copy .fph-step-list li::before {\n      top: 16px;\n      left: 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fph-product-copy\"\u003e\n\u003csection class=\"fph-section\" id=\"fph-intro\"\u003e\n\u003ch2\u003eFish Metronidazole 500mg \u0026amp; 250mg: Metronidazole for Fish with Hexamita,\u003cbr\u003eHole in the Head and Internal Parasites\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFish Zole (Fix Zole)\u003c\/strong\u003e is a fish metronidazole 500mg and 250mg tablets for ornamental aquarium fish and non-food pet birds. Aquarists use it for protozoan flagellates such as Hexamita, Spironucleus, and hole in the head disease in freshwater and saltwater tanks, at 250 mg per 10 gallons or 500 mg per 20 gallons, every 24 hours for 5 to 10 days.\u003c\/p\u003e\n\u003cp\u003eAquarists have known this metronidazole tablet under earlier names, including the discontinued Thomas Labs Fish Zole and Fish Zole Forte, along with Aqua-Zole, fishzole, and fishbiotic metronidazole. Fix Zole is the current Aqua Soma Labs version, replacing those older products with the same metronidazole at 250 mg or 500 mg per tablet. Keepers who previously used MetroPlex will find this a tablet-based option. Some keepers also search for it as fish flagyl, since it is another name for metronidazole.\u003c\/p\u003e\n\u003cp\u003eUse Fix Zole when fish or pet birds show signs that may be linked to protozoan flagellates or anaerobic-sensitive issues. Common signs differ between species, so check the lists below to identify what to watch for.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdetails class=\"fph-more\"\u003e\n\u003csummary\u003e\u003cspan class=\"fph-more-open\"\u003eSee More +\u003c\/span\u003e\u003cspan class=\"fph-more-close\"\u003eSee Less −\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"fph-more-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eLoss of appetite, gradual weight loss\u003c\/li\u003e\n\u003cli\u003eWhite stringy droppings\u003c\/li\u003e\n\u003cli\u003e\"Hole-in-the-head\" lesions (pits on head and lateral line)\u003c\/li\u003e\n\u003cli\u003eMalawi bloat (cichlid bloat), swollen abdomen\u003c\/li\u003e\n\u003cli\u003eFaded color, darkening, or body discoloration\u003c\/li\u003e\n\u003cli\u003eLethargy, hiding, reduced activity\u003c\/li\u003e\n\u003cli\u003eSudden death in cichlids and discus (Hexamita \/ Spironucleus)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms (Under Avian Vet Guidance)\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eYellow plaques in throat or crop (canker \/ trichomonosis)\u003c\/li\u003e\n\u003cli\u003ePigeon canker, especially in racing pigeons\u003c\/li\u003e\n\u003cli\u003eFrounce in raptors (falcons, hawks, owls)\u003c\/li\u003e\n\u003cli\u003eLoose or watery droppings (possible giardia)\u003c\/li\u003e\n\u003cli\u003eReduced appetite, weight loss\u003c\/li\u003e\n\u003cli\u003eDifficulty swallowing or visible discomfort when eating\u003c\/li\u003e\n\u003cli\u003eFluffed-up feathers, lethargy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eSupporting treatment with clean water, stable temperature, and appropriate husbandry helps reduce setbacks and improve outcomes. For pet birds, always confirm the diagnosis with an avian veterinarian before administering metronidazole.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online:\u003c\/strong\u003e Fix Zole ships from our U.S. warehouse the same business day.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-comparison\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eFish Zole vs Fix Zole: What Changed?\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eIf you previously used Thomas Labs Fish Zole, Fish Zole Forte, or Aqua-Zole by Aqua Soma Labs, here is what you need to know about Fix Zole:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame as Fish Zole, Fish Zole Forte, and Aqua-Zole\u003c\/strong\u003e\u003cbr\u003eFix Zole uses the same metronidazole that hobbyists relied on under the Thomas Labs Fish Zole, Fish Zole Forte, and Aqua Soma Labs Aqua-Zole names, at 250 mg or 500 mg per tablet.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e\u003cbr\u003eProduced by Aqua Soma Labs, which now makes the Fix line of fish and bird antibacterial treatments (Fix Mox, Fix Doxy, Fix Zole) after Thomas Labs discontinued its Fish Zole product.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame 60-Count Bottles\u003c\/strong\u003e\u003cbr\u003eEach bottle contains 60 tablets, the same count hobbyists expect. Choose 250 mg or 500 mg to match your tank size and treatment plan.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eUpdated Packaging, Same Formula\u003c\/strong\u003e\u003cbr\u003eThe label and brand name are new. The metronidazole inside is the same formula the hobby has used for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-benefits\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eBenefits of Fix Zole for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eTargeted Protozoan Support\u003c\/h3\u003e\n\u003cp\u003eCommonly used to help manage internal parasites and protozoan flagellates such as Hexamita and Spironucleus, which are often associated with appetite loss, weight loss, white stringy poop, Malawi bloat, and \"hole-in-the-head\" type signs in certain freshwater fish such as cichlids and discus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStocked and Ready to Ship\u003c\/h3\u003e\n\u003cp\u003eFix Zole ships from our U.S. warehouse the same business day, so you can start treatment quickly when signs appear. For pet birds, confirm the diagnosis with an avian veterinarian before use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eAvian Vet-Guided Option\u003c\/h3\u003e\n\u003cp\u003eIn non-food pet birds, metronidazole may be used under avian veterinary guidance for certain protozoal concerns such as giardia, frounce (common in raptors), and as a pigeon canker option for trichomonosis, especially in racing pigeons and related species.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFlexible 250 mg or 500 mg per Tablet\u003c\/h3\u003e\n\u003cp\u003eChoose the strength that fits your setup and plan. A consistent mg per tablet (in \u003cstrong\u003e60-count\u003c\/strong\u003e bottles) lets you scale the dose across different tank sizes or care routines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIdeal for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eMany hobbyists treat in a separate hospital tank for better observation and to help protect the display tank's biofilter and sensitive tank mates. Tablets can be pre-dissolved in a small cup of aquarium water for more even distribution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFits a Complete Care Plan\u003c\/h3\u003e\n\u003cp\u003eTreatment alone rarely fixes the problem. The best results come when you also keep the temperature stable, the water clean, stress low, and feeding appropriate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eTargeted, Not a One-Size-Fits-All Remedy\u003c\/h3\u003e\n\u003cp\u003eFix Zole is not typically used for ich (white spot), gill flukes, or Costia, and it is not a first choice for typical fin rot unless the cause has been confirmed. If symptoms persist, confirm the diagnosis or consult an aquatic or avian professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-dosage\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a dedicated hospital tank when possible. This helps you monitor behavior, control dosing more precisely, and reduce unnecessary exposure in the display aquarium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eYou may pre-dissolve the tablet in a small cup of aquarium water, then distribute it evenly across the fish tank you are treating:\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e250 mg:\u003c\/strong\u003e Add \u003cstrong\u003eone 250 mg tablet per 10 gallons (38 L)\u003c\/strong\u003e of water.\u003cbr\u003e\u003cstrong\u003e500 mg:\u003c\/strong\u003e Add \u003cstrong\u003eone 500 mg tablet per 20 gallons (76 L)\u003c\/strong\u003e of water.\u003cbr\u003e\u003cbr\u003eRepeat the dose every \u003cstrong\u003e24 hours\u003c\/strong\u003e, performing a partial water change between treatments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFilter Adjustments\u003c\/h3\u003e\n\u003cp\u003eRemove activated carbon or other chemical filtration media during treatment and keep good aeration running, since carbon can reduce metronidazole availability in the water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eContinue Treatment and Monitor Results\u003c\/h3\u003e\n\u003cp\u003eContinue daily treatment for \u003cstrong\u003e5 to 10 days\u003c\/strong\u003e (do not exceed 10 days). If there is \u003cstrong\u003eno improvement within 5 days\u003c\/strong\u003e, discontinue treatment and consult an aquatic professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eOnly administer metronidazole to non-food pet birds under the direction of an avian veterinarian. Your vet should confirm the diagnosis and advise the correct amount for the bird's weight, frequency, and duration. Tablets may be given whole, split, or crushed and mixed into soft food exactly as instructed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Zole Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMetronidazole per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e250 mg tablets\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e500 mg tablets\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003en\/a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e750 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e1 + one 250 mg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1375 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures come from the label-style guideline of 250 mg per 10 gallons, roughly 25 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 10 days, and round to the nearest practical tablet. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less while the treatment takes hold. This is normal early on. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eLook for signs it is working: appetite picking back up, droppings returning to normal, steadier activity. If nothing has changed by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 10\u003c\/h3\u003e\n\u003cp\u003eEven if the fish are improving, finish all the recommended days so the problem does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need Before You Start\u003c\/h3\u003e\n\u003cp\u003eGet these ready before the first dose:\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and pre-dissolving the tablet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e After treatment, perform a partial water change and reintroduce activated carbon (if you normally use it) to help clear any leftover treatment from the water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-mechanism\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eHow Fix Zole Works\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eFix Zole uses metronidazole, the same molecule hobbyists have relied on for years. In plain terms, it works against certain protozoa and anaerobic organisms so affected fish have a better chance to recover. This is why keepers reach for it with suspected flagellate problems such as Hexamita and Spironucleus, rather than for ich, flukes, fungus, or typical fin rot.\u003c\/p\u003e\n\u003cp\u003eEach tablet also contains standard ingredients that hold the tablet together and help it store well and disperse when mixed with water. The exact list of those ingredients is not always published and can vary by batch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc fph-acc--warn\" id=\"fph-safety\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cp\u003eWhen used as directed, Fix Zole (metronidazole) usually causes no problems in ornamental aquarium fish and non-food pet birds. Incorrect amounts, prolonged use, unnecessary repeat treatments, or combining products can increase the risk of stress and side effects.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003ePossible reactions include temporary reduced appetite, mild lethargy, or hiding behavior. If you see severe distress (rapid gill movement, loss of balance, gasping at the surface, or lying on the bottom), stop treatment, increase aeration, perform a partial water change, and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eUse metronidazole only under avian veterinary guidance. Possible reactions may include decreased appetite, loose or changed droppings, and lethargy, especially if the bird is sensitive or the amount is not correct. If your bird appears fluffed up, inactive, or stops eating, discontinue use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eSensitivity can vary by species. Whenever possible, treat fish in a separate hospital tank instead of dosing a display aquarium that contains shrimp, snails, corals, or other invertebrates. If needed, relocate sensitive invertebrates before treatment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe Use in Your System\u003c\/h3\u003e\n\u003cp\u003eDo not mix Fix Zole with other treatments or products unless advised by a professional. Avoid routine preventative use. If symptoms persist or return, confirm the diagnosis before treating again.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eStorage \u0026amp; Handling\u003c\/h3\u003e\n\u003cp\u003eStore at controlled room temperature of \u003cstrong\u003e59 to 86 F (15 to 30 C)\u003c\/strong\u003e in a cool, dry place. Keep the container tightly closed to protect tablets from moisture and light. Keep out of reach of children and pets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant Safety Warning\u003c\/h3\u003e\n\u003cp\u003eFix Zole is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. It is not for animals raised for food. Always follow label directions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\" id=\"fph-shipping\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with rates and delivery times calculated at checkout. For full details, see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-acc\"\u003e\n\u003csummary\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003c\/summary\u003e\n\u003cdiv class=\"fph-acc-body\"\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections, and Mycoplasma in fish and non-food pet birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zithro (Azithromycin) 250mg\u003c\/strong\u003e A treatment for fin rot, columnaris, gill disease, and avian respiratory concerns in fish and non-food pet birds. Available in 12-count and 30-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zithro\"\u003eShop Fix Zithro\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems, including skin and soft-tissue concerns, in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment used against a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial problems in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers, and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial problems, including fin rot, ulcers, columnaris, and septicemia, in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterials Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Treatments Blog\u003c\/strong\u003e\u003c\/a\u003e for practical usage guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003csection class=\"fph-section\" id=\"fph-faq\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is fish zole?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish zole is a common name for metronidazole sold as an aquarium treatment. Fix Zole is the current version: metronidazole 250 mg and 500 mg tablets for ornamental fish and non-food pet birds. It is used for protozoan problems like Hexamita, Spironucleus, and hole in the head disease, not ich, flukes, or fungus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat does metronidazole treat in fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIn aquarium fish, metronidazole is mainly used for protozoan flagellates such as Hexamita and Spironucleus, the organisms often behind hole-in-the-head disease, white stringy droppings, and unexplained wasting in cichlids and discus. It does not treat ich, flukes, fungus, or most typical fin rot, which need different treatments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Zole used for in aquarium fish and pet birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zole (metronidazole) is commonly used by hobbyists to help manage certain protozoan concerns in ornamental aquarium fish, including issues often associated with Hexamita, Spironucleus, and internal parasites. In non-food pet birds, metronidazole may be used only under avian veterinary guidance for confirmed protozoal concerns such as canker (trichomonosis).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zole the same as Fish Zole or Fish Zole Forte?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zole contains the same metronidazole hobbyists have historically searched for as Thomas Labs Fish Zole, Fish Zole Forte, Aqua-Zole, or fishbiotic metronidazole. The 250 mg option stands in for the standard Fish Zole strength, and the 500 mg option is the Fish Zole Forte equivalent. Product names and directions can vary, so always follow the instructions for the specific product you have.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zole the same as Aqua-Zole by Aqua Soma Labs?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Aqua-Zole was an earlier brand name; Fix Zole is the current Aqua Soma Labs metronidazole product, with the same metronidazole at 250 mg or 500 mg per tablet in 60-count bottles. The metronidazole, strength, and intended use remain the same; only the brand name and packaging have been updated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWill Fix Zole harm my tank's biological filter?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eMetronidazole mainly targets protozoa and anaerobic organisms, so many keepers find it gentler on the nitrifying bacteria in a biofilter than some broad treatments. It is not risk-free, though. Treating in a separate hospital tank is the safest approach. If you must dose a cycled display, keep activated carbon out, run strong aeration, and test ammonia and nitrite daily so you can react to any spike with a partial water change.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the fish metronidazole 500mg dosage?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eThe fish metronidazole 500mg dosage guide is one 500 mg tablet per 20 gallons (76 L) of tank water, dosed every 24 hours for 5 to 10 days, with a partial water change between doses. For the 250 mg strength, use one tablet per 10 gallons (38 L), roughly 25 mg per gallon. Do not exceed 10 days, and if there is no improvement within 5 days, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan metronidazole treat fish bloat?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt is one of the treatments hobbyists reach for when Malawi bloat (cichlid bloat) is suspected, because that problem is often linked to Hexamita flagellates. Metronidazole is used at the standard guide of 250 mg per 10 gallons (38 L), and keepers pair treatment with clean water, stable temperature, and reduced stress. Bloat has several possible causes, so if there is no change within 5 days, stop and confirm the diagnosis with an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy metronidazole for fish? Do Walmart or PetSmart sell it?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can order Fix Zole, the current fish metronidazole, directly from Fine Pet Health in 250 mg and 500 mg strengths, in 60-count bottles. General retailers such as Walmart, PetSmart, Petco, and Tractor Supply do not carry the Aqua Soma Labs line, so a dedicated online supplier is the reliable route. Orders ship from our U.S. warehouse the same business day via USPS or UPS.\u003c\/p\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/finepethealth.com\/collections\/fish-bird-antibacterials\" class=\"fph-faq-link\"\u003eBrowse Fish \u0026amp; Bird Treatments Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan fish zole be used for dogs or cats?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zole is labeled for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e. Veterinarians do use metronidazole for dogs and cats (for giardia, IBD, and some infections), but the right amount depends on the animal's weight and the format differs from a fish tablet. \u003cstrong\u003eDo not give Fix Zole to a dog or cat without a licensed veterinarian\u003c\/strong\u003e confirming the diagnosis and the correct amount. Fix Zole is also not for chickens, ducks, or other food-producing birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"250-mg (60 Count)","offer_id":50744371085551,"sku":"267844","price":41.99,"currency_code":"USD","in_stock":true},{"title":"500-mg (60 Count)","offer_id":50744371118319,"sku":"029854","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/2296\/9071\/files\/fish-zole-metronidazole-250mg-60-count-fish-antibacterial.webp?v=1789229502"}],"url":"https:\/\/myfishmox.com\/collections\/fish-bird-antibacterials.oembed","provider":"My Fish Mox","version":"1.0","type":"link"}