Well....we'll find out this December! ahahaha......last winter was fairly mild. But here is what a man we know has done to his pool every year: he partially drains the pool, takes a salt block and puts it in a 5 gallon bucket, pokes holes in the lid and puts it on. Then he places it in the center (he has a round bubble pool) and puts the cover on the pool. He says this keeps it from freezing solid. I think I'll ask around, but I've noticed some homes that have them up for a few years so we're going to give it a try. Next problem for me is the barn cats!!! They keep jumping up on the rail and looking into the pool.....anyone want a cat? or 12? ahaha....Thanks!