Fish Pen   250mg   30 Capsules

Fish Pen 250mg 30 Capsules

Regular price $15.99 Sale

Fish Pen™ (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.