This revolutionary submersible Water & Air Pump has a Dual-Impeller Design that Pumps Water on one end & Generates Oxygen on the other! Pumps 1200 gph of water and has a 17' shut-off. Custom designed diffuser creates a wide dispersal of Air Bubbles. Aerates ponds up to 1,000 Gallons at 2' Depth. Only one outlet needed for both water and air.