Liquid Clear Defense is the easy natural way to keep ponds clear, This ""Best Seller"" is specially formulated for ponds fountains and birdbaths, Provides crystal clear water, Removes organic muck and sediment, Maintains biological filters, Great for spring start-ups and after pond clean-outs, 1 gallon treats up to 2 000 gallons for SAFE FOR: Plants Birds Pets Fish Wildlife and the Environment, months, SKU: AES022