Powerful probiotic blends of naturally occurring heterotrophic bacteria have been specifically chosen for their ability to quickly digest organic sludge common in aquariums. Sludge includes fish waste; leftover food and other decaying organic matter. When left unchecked sludge can lead to unsightly algae growth. Using Fritzzyme TurboClean biological aquarium cleaner as part of regular maintenance will greatly reduce the need for substrate cleaning and water changes as well as prolong the life of filter media. FR83307 Casebuy:12.