API® FUNGUS CURE fish remedy effectively treats fungus (Saprolegnia spp. & Achlya spp.), mouth fungus (Cotton Mouth Disease), Body Slime & Eye cloud and Fin & Tail Rot infections. Quickly controls contagious fungus and secondary bacterial infections. Helps prevent the growth of fungus on fish eggs prior to hatching. For use in freshwater aquariums. Note: This fish remedy will cause a slight discoloration of water which can be removed with activated carbon. Size: 10 packets per box. For each 10 gallons of water, empty one packet directly into aquarium. Repeat dose after 48 hours. Wait another 48 hours then change 25% of the aquarium water and add fresh activated carbon or replace filter cartridge.