Guaranteed to clear pond water. The Aquascape UltraKlean™ Biological Pressure Filter with a high output ultraviolet clarifier/sterilizer and an integrated electronic bulb-saver option, provides pond owners with optimum water conditions and crystal clear pond water. The unique sponge-free design minimizes maintenance and maximizes efficient mechanical and biological filtration. Simple-to-use cleaning feature allows for the unit to be backwashed in less than five minutes without opening the canister or getting hands dirty. Provides optimal filtration for ponds up to 3,500 gallons / 13,000 liters. Efficiently traps dirt and debris and eliminates green water. Includes Aquascape UltraKlean™ Bio-Media and T5 high-output ultraviolet clarifier/sterilizer. Easily integrated into new or existing ponds.