Cecil, no winter aeration due to the RES. Rapid snow melt last week brought the pond up 7-8" pretty quick while it was still ice covered, I was worried it might have temperature "shocked" some of my RES. I have also been keeping an eye on the wind mixing the water column after ice out. So far only two RES, both looked very thick. I still might find a few more floaters in the next few days, last year I found a half dozen RES in the 4-7" range after ice out.