Fish Pen by Fish Aid Antibiotics exerts a bactericidal action on gram positive and some gram negative bacteria. Useful for the control of some common bacterial diseases of fish including fin and tail rot and flexibacter infections.
Directions: Add one tablet (250 mg) into aquarium for each 10 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While duration of treatment depends on type and severity of the infection, it is recommended that extended baths in the medication continue for a minimum of 5 days & for not more than 10 days. Discontinue treatment if no improvement is noted within 5 days.