I wondering how much the size of a pool would affect heat loss overnight? Currently I have a 12' Intex that is 30" deep, approximately 1500 gallons. At the end of July the peak daily temperature was 33* and dropped to 28* the next morning. This was with a solar blanket. I was thinking of upgrading to an oval 12x24 Intex next year with approximately 8400 gallons. Would the larger pool lose less heat overnight or would it be about the same?