Sludge Remover Bacteria blocks contain a proven blend of enzyme producing pond bacteria which naturally reduce odor causing, decomposing organic debris and muck. Sludge is the result of fish waste, dead algae or plant material, uneaten fish food, leaves and other debris. Blocks simply dissolve in the water for easy application in water gardens and koi ponds.
Apply one 1 oz. block per 1000 gallons of water weekly. For heavy sludge applications, apply two 1 oz. blocks per 1000 gallons of water weekly until desired results are achieved. For heavy sludge applications apply two 1 oz. blocks per 1000 gallons of water weekly.