I have learned something. A .75 hp horizontal aerator is awfully big for a .15 acre pond! After installing and turning on the unit the water stayed at saturation for oxygen continuously, but the clarity started to deteriorate. Secchi readings dropped from 26 inches down to 8 inches and the water turned brownish from suspended sediment. I've sinced turned it off and the secchi readings are creeping up about .5 inch per day. I am going to move the unit to my 1.25 acre pond and try to switch to a surface agitator in the little pond to work in tandem with my two horizontally oriented sweeper nozzles. My DO is still virtually 100 percent saturation, but I've seen that change quickly in the summer so I'm not taking any chances.
