Natural muck and sludge removal in water with heavy organic debris loads. Highly concentrated probiotic formula enhances natural bacteria to aid in decomposition of sludge and bottom muck. Treat all year long with cold/ warm water strains. BioStart complex offers new technology to provide starter food for spores upon entry to water. Apply monthly for 90 days then every other month until muck is gone. 1 Liquid Gallon or 4 Throw Packs will treat 1 surface acre 4 to 6 ft deep.