FritzZyme^® TurboClean is a powerful probiotic blend of naturally-occurring heterotrophic bacteria 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 and other water quality issues. The bacteria in FritzZyme TurboClean is safe, non-toxic and non-pathogenic.