Fish: Add one tablet (250 mg) into aquarium for each 10 gallons of water. Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While treatment duration depends on the type and severity of infection, it is recommended that extended baths in the medication continue for a minimum of 5 days and for not more than 10 days. Discontinued treatment if no improvement is noted within 5 days.