A revolutionary product specially developed to control many types of algae in freshwater aquariums containing live fish and plants. Effectively controls green water algae blooms. Keeps freshwater aquariums clean and clear. Weekly doses of Algaefix will control algae growth and reduce aquarium maintenance. Algaefix is a liquid algae-control product for use in ornamental fishponds, water gardens, fountains and freshwater aquariums. Algaefix is specially formulated for use in ponds and aquariums containing live plants and fish. Algaefix controls many types of algae, including green water" blooms and filamentous algae. Algaefix is colorless and non-corrosive. Algaefix can be used in freshwater aquariums containing live plants and fish. Do not use with crustaceans including crabs shrimp and freshwater lobsters."