FritzZyme® MONSTER 460 is a powerful, concentrated probiotic blend of naturally-occurring, environmentally-friendly, live saltwater-specific heterotrophic bacteria capable of digesting organic sludge common in aquariums. FritzZyme® MONSTER 460 has been specially formulated to handle the organic waste produced by “monster” fish, including puffers, sharks, rays, grouper, eels, lionfish, angelfish, etc., as well as heavily-stocked tanks. Sludge includes fish waste, leftover food and other decaying organic matter. Using FritzZyme® MONSTER 460 as part of a regular maintenance program, along with gravel vacuuming and water changes, will greatly reduce aquarium care and prolong filter media life. The bacteria in FritzZyme® MONSTER 460 is safe, non-toxic and non-pathogenic.