Hi! I have a vinyl in ground pool, and live in southern CA. In the past 16 days, the weather has been mostly in the 90s. We had 2 3 digit temp. days. In that time my pool lost 17 1/2 inches. No one has been in the pool for several weeks, so no water is being lost that way. The pool now needs to be filled up to 2 times a day to stay full. The pool liner was new 4 years ago, and this issue started last year. Does this sound normal to you guys?