Hi my name is Wanda I live in central Indiana. I have a 24 ft round pool, 52 inches deep. We closed in fall and dropped water level 24 inches below the skimmer. We noticed the flow thru cover was really low in pool. And sides were wrinkling. We took cover off and only has a couple of inches in pool. My guess is a pin hole or small hole in side due to water still in bottom? What can we do?