To use: Remove filter carbon and continue aeration. Add five milliliters for every five U.S. gallons. Repeat dose after 48 hours. After another 48 hours, perform 25 percent water change and add fresh activated filter carbon. 1 ounce treats 30 U.S. gallons. Keep out of reach of children. Do not use on fish intended for human consumption. For use only with ornamental fish. Treats fungus infections and prevents secondary infection. Also contains a special ingredient to protect the slime coating on fish. Each dose contains 22 milligrams of neutroflavine and povidone/colloid mixture.