These reliable units are one of the highest oxygen producing aerators we offer! Because of the high circulation rate, these aerators are especially helpful in controlling surface algae and other unsightly surface problems. Comes with 50' power cord (100' available). Designed for continuous duty operation in fresh or salt water. Thermal overload protection with automatic reset. Easy to install or remove - making it great for portable emergency operation. Especially useful in shallow ponds with depths as low as 2 or 3' or up to 6' deep. 115 volts.