The Beckett 500 GPH 38 Watt Submersible Biological Pond Pump Kit W/Fountain Nozzles, Filters, Bio-Balls, Filtration Media for Ponds, Waterfalls, and Water Gardens is an in-pond pump and submersible filter system. It pumps a maximum of 500 gallons per hour, with a maximum pumping height of 6.5 ft. At 38 watts, the energy-efficient design pumps 440 gallons per hour at the height of 1 ft. The 500 GPH pump is ideal for small ponds and water gardens up to 1000 gallons. This all-in-one pond filter pump kit provides mechanical and biological filtration. Bio-filters efficiently process waste and clarify pond water by reducing ammonia and promoting beneficial bacteria. Beneficial bacteria feed on the organic material in the water that passes through the filters and bio-balls to keep your water clean and clear. Clean your filters regularly by submerging them into a bucket half-filled with pond water, gently massage and squeeze the foam. Gently submerge the bio-balls in the bucket removing any sludge or large debris. This ensures that the beneficial bacteria remain in the foam filter and the bio-balls. Purchase the Beckett bio-box separately with this kit so you’ll always have clean filters handy for added convenience. This efficient filtration system creates the ideal ecosystem for ponds with fish. The kit includes a 500 GPH pump, 20 bio-balls, five foam filters, five strainers, one bio-box, two extension tubes, three fountain nozzle heads, a two-way flow control valve, two hose adapters, and a fountain body. The pump is compatible with 3/8 in., 1/2 in., or 3/4 in. ID tubing and has a 15-foot cord.