Excessive algae growth is the most common complaint of aquarium keepers of all experience levels. Left unchecked it is both unattractive and hazardous to fish and plant life. Fritz Algae Clean Out targets string algae and blanketweed and green water caused by sindle-celled algae. Unlike some algaecides on the market Fritz Algae Clean Out contains no copper and is a selective algae control product that will not harm fish and live plants when used in direct contact. Fritz Algae Clean Out is effective in both freshwater an saltwater aquariums; fountains and small ponds. FR48008