API POND ECOFIX SLUDGE DESTROYER is a pond cleaner and sludge remover featuring natural bacteria. This product contains natural active ingredients, and go a long way in keeping your pond clean and reducing the need for maintenance. Features: Contains natural active ingredients to break down fish waste and consume pond sludge Breaks down dead algae and digests leaves and grass clippings Helps to reduce overall pond maintenance and keep pond clean Use twice a week for two weeks for initial dose , quick clean up and end of season, and once every other week for maintenance Includes: Contains one (1) API POND ECOFIX SLUDGE DESTROYER Pond Cleaner And Sludge Remover With Natural Bacteria 64-Ounce Bottle Intended Pet(s): Fish Product Dimensions: 6.75 x 3 x 8.5 Capacity: 64 fl oz Directions: Shake well, and add ½ cup (120 ml) per 500 U.S. gallons (1, 890 L) of pond water twice a week for 2 weeks at the beginning and end of pond season. For maintenance, add 4 Tbsp. (60 ml) per 500 U.S. gallons (1, 890 L) of pond water every 2 weeks. Caution: For ornamental pond use only. API PondCare Ecofix Bacterial Clarifier Pond Water Conditioner, Size: 64 Fl oz | PetSmart