I have a one acre pond. Use a 1 1/2 hp pump running off of 220 volts. My well easily will pump 35 gallons of water a minute. I have a shower head type spray head that will output 10 gallons a minute. Ran 2 inch pipe from the well to the center of the pond, where it 90 degrees up I reduced to 1 1/2 inch pipe. This has allowed me to keep my pond full all the time. So far the pond and fish both seem to be doing good.

If wishes were horses, dreamers would ride.

I must admit that I am not a fan of the Catfish \:\)