EasyPro Pond Products SBB80 Ponds Lakes Sludge Remover

Initially 1 block per 1000 gallons. Maintenance 1 block per 1000 gallons. Bottle Treats 3000 Gallon pond for up to 6 months. EasyPro Sludge Remover, 5 lb. pail, 1 oz. blocks - Approx. 80 blocks.You may also like EasyPro ABB05X Sludge Remover Pellets - 5 lb Pail.