Bill Went out back to the pond,fixed me up a weigted temp gauge and turned the air off the diffuser,and for about and hour with it on the bottom at 3-4 feet it only got to about (34.8F).THink ill have to go out on the dock,into deep water and drill some holes and check from the bottom up.I was measuring only 5 foot from shore. don't no if this was good or bad temp.
