Aquascape Aquaclearer Extreme Dry  Beneficial Bacteria for Ponds - 1.1 lb Clear Up Green Water & Help Prevent Algae Growth Great for seeding biological filters in the spring - All Natural Ingredients! 1.1 lb. (500 g) treats up to 104,000 gallons This product has been replaced by a new formulation TJB-INC will be shipping you the 2012 updated product