Just my quarters worth. Have a Loop-Lock for my IG and gave up on it. Here in Northeast PA, comes late Winter it would be totally frozen in the block of ice known as my pool. Repeated snow, sun, melt, freezing, would load the thing down and eventually lock it in ice. I've measured up to 18" of ice over the years. Now...don't even bother to cover. Keep equipment running as long as possible to allow vacuuming and chemistry balance, then winterize. Then in late February or March I drink beers and play with ways to melt the ice using my old Jacuzzi pump.
Al