On the topic of aeration... it doesn't even have to cost you much to set-up a basic aeration system or to run it. A little tricky to get it going now with ice on.. but not impossible by any means. It takes very little air to open a good sized hole in even thick ice. A few dollars and a few hours work and you can save yourself a whole mess of trouble. Much easier to plug in an extension cord then it is to keep clearing snow... and even when you do depending on how the ice formed you might not get as much light penetration as you would like.
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