API POND ALGAEFIX Algae Control 1-Gallon BottleBefore use, make certain that the pond fountain has vigorous aeration; thoroughly mix into pond fountain water and disperse evenly Does not contain copper This EPA registered pond algaecide will not harm fish, plants, surrounding wildlife and pets when used as directed Helps resolve algae problems and controls the formation of new algae; works fast; effectively controls most types of algae including green water (Chlorella), string and hair algae