OK I have read about people using an air pillow to hold up their pool cover for winter but I am wondering if it can be used year round. The reason I ask is that we do not always get to use the pool during the week and the cover eventually starts to sink a little and then when we do take the cover off it is harder because of it is full of water. I was thinking of using just a inner tube or larger swim ring since I have a 12' round and maybe just trying to weight it some how so that the pillow stays in the center of the pool. Thoughts.