With trout being so finicky to temp. and O2 it's hard to get any hard and fast rules on aeration due to the differences in the ponds.
My opinion is keep a close eye on temps at different depths and when it's warm weather run your diffusers when air temp is below 70 and at a depth where trout will be ok, say 68 degrees, but not in any deeper water than you have to so you can prolong your reservoir of cooler water.
My aerator is set at 5ft. and only runs when the air temp. is below 66*, I don't move it cause my piped inflow of 95 gpm is from highly oxygenated stream water and the trout do fine all summer, every pond is different and much of the time it's trial and error.
Last edited by adirondack pond; 08/27/10 09:13 AM.
