Animals & Pet Supplies · Fish Antibiotics

Fish Pen - Penicillin

Aquarium · sold by Pittsboro Feed · $57.28–$61.77 · in stock

The original broad-spectrum antibiotic — a trusted first-line treatment for gram-positive bacterial infections in freshwater ornamental fish. Why choose Penicillin VK? Penicillin V Potassium (Penicillin VK) is the original and most established antibiotic class in both human and veterinary medicine. It is particularly effective against gram-positive bacteria — the organisms most commonly responsible for mouth rot, popeye, and early-stage fin rot in freshwater fish. Its long track record, predictable activity profile, and gentle impact on the aquarium ecosystem make it an ideal first-line…

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