Treats saprolegenia fungus infections and prevents secondary infection. One ounce treats 30 u. s. gallons. Keep out of reach of children. For use with ornamental fish only. Do not use on fish intended for human consumption. Active Ingredients: Neutroflavine And Povidone/Colloid Mixture. Contains A Special Ingredient To Replace The Natural Slime Coating On Fish To Prevent Further Infection. Each Dose Contains 22 Milligrams Of Neutroflavine And Povidone/Colloid Mixture. 4 OUNCES