The Pondmaster AP-20 air pump is designed to oxygenate either pond or aquarium applications. The oil-less motor is designed to operate efficiently with low energy consumption. Can be used with 5/8 inch tubing to extend it range in pond applications, includes a diffuser that has 12 outlets and connects to standard airline tubing. Creates a pressure of 5.8 psi and pumps to a depth of 10 ft.