FritzPond FritzZyme® 360 is a concentrated formulation of freshwater-specific strains of beneficial sludge removing bacteria. Using FritzPond FritzZyme® 360 monthly as part of regular maintenance will help keep ponds clear of sludge and pollutants including fish waste, leftover food and other decaying organic matter. FritzPond FritzZyme® 360 is safe for all fish, plants and wildlife. Available dry, liquid or in water-soluble bags.