I partially drained (below skimmer and return lines) and closed my pool at the end of September/ early October, and I realized yesterday that when I went to pump the water off my cover, that the pool is now basically empty. I first guess is that I have a leak in my floor drain line. I know I did not have this problem last year. My wife and I just received an offer on this house and expect to have a contract soon. Am I looking at a huge repair bill? I have a vinyl liner and I am afraid to remove the cover to see what kind of shape the liner is in. Insight and advice is greatly appreciated.