Eric - your pond is too big and deep for effective use of the Eco7Plus commercial pump. For your application look for a rotary vane or rocking piston (wobble r) compressor (1/4-1/3hp). If the pond was mine I would install two diffusers one in the deep end and one in towards the narrow end in about 8-9ft depth. The diffuser in the wider deep end could be a double head diffuser providing the compressor has 3cfm of air flow.

The water inflow and flushing is helping to keep the pond be in fairly good condition. If you did not have the flushing the algae and weeds would overcome the pond.

Last edited by Bill Cody; 07/01/14 01:24 PM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management