Fish Penicillin Antibiotics: Fish Pen Forte

Fish Pen and Fix Pen are pharmaceutical grade fish penicillin antibiotics. This antibiotic is used to treat parasitic and bacterial infections in fish, effectively turning your aquarium’s struggling ecosystem into a thriving environment. At eFishMox, we offer fish tank penicillin in 250 mg and 500 mg tablet, and each bottle is sealed for safety and has instructions for fish use and the expiration date of the medicine. 

We want to guarantee our customers the longest shelf life possible, so we keep our inventory small. This allows us to fulfill orders with current stock that features the most distant expiration dates. Receive the best aquarium penicillin for your fish tank—order before 2 pm to qualify for same-day shipping.