Fish & Bird Antibacterials

Fish Cephalexin (Fish Flex): Uses and How It Compares
What fish cephalexin is used for in ornamental fish and pet birds, how Fish Flex and Fish Flex Forte differ, and how it compares with amoxicillin. Read more...
Erythromycin for Fish: API E.M., Maracyn and Alternatives
Erythromycin for fish is a macrolide used in the hobby for gram-positive infections. We explain API E.M. erythromycin, aquarium use, and in-range alternatives. Read more...
Betta Fish Antibiotics: Fin Rot, Popeye and Bacterial Infections
Betta fish antibiotics: how keepers tell bacterial signs from water-quality problems, which classes are used, and why the label and a vet come first. Read more...
Fin Rot Antibiotics: When Your Fish Actually Needs One
Fin rot antibiotics: learn when clean water is enough, when bacteria like Aeromonas need treatment, and where amoxicillin and erythromycin fit. Read more...
Broad-Spectrum Antibiotics for Fish: When to Use Them
Broad-spectrum antibiotics for fish cover gram-positive and gram-negative bacteria, but they are not always the right choice. Learn when to use them and when not. Read more...
Maracyn 2 vs Single-Ingredient Fish Antibiotics
Maracyn 2 contains minocycline. Compare it with single-ingredient fish antibiotics by class, and learn when to treat and when to check water first. Read more...
Metronidazole for Fish: Hole-in-the-Head, Hexamita and More
Metronidazole for fish is used for anaerobic bacteria and protozoa such as Hexamita. Learn the signs, the products and why water quality comes first. Read more...
Fish Doxycycline (Fish Doxy): What It Treats in Aquarium Fish
Fish doxycycline is a tetracycline-class antibacterial used in ornamental fish. Learn what fish doxy covers, its limits in hard water, and safe use. Read more...
Aquarium Antibiotics: Choosing and Using Them in Your Tank
A practical guide to aquarium antibiotics: when to treat, hospital tank vs display, protecting the biofilter, and choosing capsules or powders by tank volume. Read more...
What Is Fish Mox? Amoxicillin for Aquarium Fish
Fish Mox is amoxicillin for ornamental fish. Learn what fish amoxicillin covers, what it cannot treat, and why water quality comes first. Read more...
Fish Antibiotics: The Complete Guide for Aquarium Keepers
Fish antibiotics are antibacterials labelled for ornamental fish. Learn the types, how to choose, and why water quality comes first. Read more...
Fish Mox for Molly: When Antibacterials Are Used
A careful look at when Fish Mox for molly is used, what signs might point to infection, and why water quality comes first. Read more...
Fish Mox for Pleco: When Antibacterials Are Used
A plain guide to when Fish Mox (amoxicillin) is used for plecos, why water quality matters more, and how to decide with an aquatic vet. Read more...
Fish Mox for Tetra: When Antibacterials Are Used
A careful look at when Fish Mox for tetra is considered, why water quality comes first, and how to follow the label without guessing. Read more...
Fish Mox for Cichlid: When Antibacterials Are Used
What cichlid keepers should know about Fish Mox (amoxicillin) for ornamental fish, when it is used, and why water quality and the label come first. Read more...
Fish Mox for Oscar: When Antibacterials Are Used
This article answers when Fish Mox for Oscar might be considered, what signs to look for, and why water quality and veterinary advice come first. Read more...
Fish Mox for Guppy: When Antibacterials Are Used
A careful look at when Fish Mox (amoxicillin) is used for guppies, why water quality matters more than any bottle, and what the label actually covers. Read more...
Fish Mox for Angelfish: When Antibacterials Are Used
What angelfish keepers should check before reaching for Fish Mox, and why the label and a vet—not a forum post—set the course. Read more...
Fish Mox for Discus: When Antibacterials Are Used
A careful look at when Fish Mox (amoxicillin) is used for discus, why water quality and quarantine matter more, and what the label actually covers. Read more...
Fish Mox for Koi: When Antibacterials Are Used
What koi keepers should know before reaching for an ornamental-fish antibacterial, and why water quality and veterinary advice come first. Read more...
Fish Mox for Goldfish: When Antibacterials Are Used
A careful look at when Fish Mox (amoxicillin) is used for goldfish, why water quality comes first, and how to work with an aquatic vet. Read more...
Fish Mox for Betta: When Antibacterials Are Used
What Fish Mox for betta is used for, why water quality should be checked first, and how to decide if an antibacterial is warranted. Read more...
Wasting Disease in Aquarium Fish: Signs and Care
Wasting disease in aquarium fish is a description of a sign, not a diagnosis. This article explains what to look for and how to respond. Read more...
Bloat in Aquarium Fish: Signs, Causes and Care Steps
A practical guide to recognising bloat in aquarium fish, checking water quality first, and understanding when antibacterial treatment may be warranted. Read more...
Hole in the Head in Aquarium Fish: Signs and Care
What hole in the head in aquarium fish can indicate, why water quality is the first thing to check, and when to involve an aquatic veterinarian. Read more...
Red Streaks on Fins in Aquarium Fish: What to Check
Red streaks on fins in aquarium fish are a sign, not a diagnosis. This article explains what to check first, what the signs can mean, and where a labelled antibacterial fits. Read more...
Columnaris in Aquarium Fish: Signs, Causes and Care
Columnaris in aquarium fish can look like fin rot or a fungal infection, so here is how to spot it, what causes it, and how to respond with better water quality and the right antibacterial. Read more...
Popeye in Aquarium Fish: Signs, Causes and Care
Popeye in aquarium fish is a sign, not a diagnosis — this guide covers what swelling can mean, why water quality comes first, and how antibacterials fit in. Read more...