Sounds like its time to put the timer on and run this thing during the daylight only! I assume my aerator can't be costing that much, it is a smaller motor, don't have the specs on it handy, but it does run 24/7. Kelley gave me some very helpful advice, and I finally got the algae under control, so what is the normal time for a aerator to run? In TX, in 100 degree days/80 degree nights. 2/3 acre pond X 12' deep, 1/4 hp aerator with membrane diffuser.