Each packet contains: Metronidazole 500mg active
Add one packet (500mg) into aquarium for every 15 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change is made between treatments, while the duration of treatment depends on type and severity of infection, it is recommended that extended medication baths continue for a minimum of 5 days & for not more than 10 days. Discontinue treatment if no improvement is noted within 5 days, to remove harmless yellow color, change 20% of water and use charcoal filter until clear.