Aquascape 95053 UltraKlean 2000 Gallon Biological Pressure Filter with 14 Watt UV Clarifier Sterilizer for Pond Water Feature, 2,700 GPH Provides optimal filtration for ponds up to 2,000 gallons with a maximum flow rate of 2,700 GPH Sponge-free design minimizes maintenance and maximizes efficient mechanical and biological filtration High-output T5 ultraviolet clarifier eliminates green water; Ultraclean Bio Balls efficiently trap dirt and debris Integrated electronic bulb-saver extends bulb life 20-foot cord; 3-year limited warranty