We have had a fairly mild winter in southern MN. ICE is only about 10". I aerated through Dec and have stoped in January, when the air started to get realy cold. My water temp just under the ice is 39 degrees and 41 degrees at 9'. When the ice was 2-3" thick last month I noticed FH up in the shallows. I have tried to keep the pond clear of snow cover in spots. Is there any way to tell how the fish are doing? I can't seem to catch them. I prefer to belive it is my poor fishing ability than dead fish. Are the FH just suning or are they starveing for air or something else?