Something else just came to mind... I just talked to the DNR and was reminded just how thick the ice can get. I think he said 3-4 feet is possible. If the pond is only 8' deep and 3' is ice that doesn't leave much distance from the bottom. If I was to suspend the airstone higher up and then not run it all the time to avoid pumping in cold water, then couldn't the ice actually freeze down to the height of the airstone? Seems with a pond only 8' deep that there might not be a choice on what depth to put the airstone at?
Lew
