Joey, I figure .657 acres with an average depth of 4-5 ft would put you in the million gallon range, you can get a central diffuser to turn that many gallons one time easy enough but you will find a lot of the gallons being turned much more and many in the shallows considerbly less than that, This is where sizing comes in, and thus the reasoning to stretch out the diffusers, A deeper pond with the same gallons (less surface acraege) would turn more with fewer diffusers because there will be more gallons lifted by the vertical current as it entrains more gallons on the way to the surface. The deeper the more effecient but you have to work with the depths you have.
