Spent some time at the Bass Masters in SC observing the Lake Life Pump, it is interesting and may be quite a circulator ( and maybe aerator also) I think time will tell if and where it fits.The jury is still out. I would like to see the performance data over a wide variety of conditions and over a multiple year timeframe.I agree 20 acres is a lot of water to circulate and aerate. Keep an open mind on this device and test results should be plentiful by this summer.