I use a brushless pump to fill out pond with a float switch. The float on the pump in the creek is just a sump pump float. The float in the pond is a reverce switch. The pond one turns on when water level drops if there is water in the creek then the pump will turn on and fill the pond. 3200 gallons per hour is tones of water for our pond. It is very efficient on power and with no brushes has run flawless for five years. I run a two in pipe 200 feet with at least 20 feet of lift.

Cheers Don.

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7/8th of an acre, Perch only pond, Ontario, Canada.