Fritzpond FritzZyme 360 is a powerful probiotic blend of naturally occurring, live heterotrophic bacteria capable of digesting organic sludge common in ponds, fountains and water gardens resulting in a year round clean, clear and odor free pond. Sludge includes fish waste, leftover food, dead plants and other decaying organic matter. Using FritzPond FritzZyme 360 as part of a regular maintenance program will greatly reduce pond maintenance and water changes. The bacteria in FritzPond FritzZyme 360 are safe, non-toxic and non-pathogenic. 16 oz bottle.