FritzZyme 460 is a powerful probiotic blend of naturally occurring, live heterotrophic bacteria capable of digesting organic sludge common in aquariums. Sludge includes fish waste, leftover food and other decaying organic matter. Using FritzZyme 460 as part of a regular maintenance program will greatly reduce aquarium care including gravel vacuuming, water changes as well as prolonging filter media life. Rather than relying on freshwater bacteria to treat both fresh and saltwater, Fritz Industries has identified the species that naturally occur and perform best for each environment. FritzZyme 460 contains only species of bacteria native to saltwater. The bacteria in FritzZyme 460 is safe, non-toxic and non-pathogenic.