Fish Pen Forte - Penicillin - 500mg 100 Count "gluten-free" we recommend you change filters

we recommend you change filters every 6 months

or drop it in a puddle

Measures: 6

Up to 25-year shelf life

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Fish Pen Forte - Penicillin - 500mg 100 Count "gluten-free" we recommend you change filtersFish Pen Forte (Penicillin V Potassium) from Thomas Labs is an antibiotic that exerts a bactericidal action on gram positive and some gram negative bacteria in fish. This fish antibiotic is useful for control of some common bacterial diseases in fish, including diseases caused by bacteria such as fin and tail rot and Flexibacter infections. Directions For Use Add one tablet into aquarium for every 20 gallons of water to be treated. Repeat in 24 hours.