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Fish Penicillin (Penicillin 250mg) is a pharmaceutical-grade antibiotic used to treat fin rot, ulcers, tail disease, and other gram-positive bacterial infections in ornamental fish. Ideal for maintaining a healthy aquarium environment.
Add one tablet (250mg) per 40 gallons of aquarium water. Repeat every 24 hours for 5–10 days. Perform partial water changes between doses. Stop if no improvement is noted within 5 days.
Store tightly sealed in a cool, dry place (59°–86°F). For aquarium use only. Keep out of reach of children.