EasyPro Pond Products PA34W 1/4 hp Rocking Piston Aeration System Kit with Quick Sink Tubing 1/4 HP compressor, 2.3 cfm, 1.7 amps, aerates up to 50 feet deep Rocking piston pond aeration system - 1/4 HP kit with Quick Sink Tubing Includes new EasyPro self-sinking air diffuser base QS1, which eliminates the need to add gravel or sand to weight the diffuser Also includes fittings and clamps