I live in the Northeast, and I have a 30' round pool (52" deep). Covering the pool is NOT an option where I live. We had such a bad Winter that ice totally destroyed my 1-year-old cover. Just purchased a new one ~ a RipStopper. Unfortunately, the air pillow got a big hole also. However, the dingbats at my local pool store (who have been around for years and do have a good reputation) sold me a 4' x 15' rectangular air pillow, even though I told them my pool was ROUND and not oval. The pillow only had one grommet on one end, so needless to say even though we tied it on two ends, it didn't fit properly and ended up moving not long after the pool was covered.
My question now is what size air pillow should I really buy? I don't want another huge, rectangular one. I want a round one but am just not sure exactly what size to get. I've done so much research, and there are so many different options and opinions. Help!