I live in Ohio and had my pool closed in 10/09 by a Pool company. I have a solid cover on the pool and after all this snow I noticed my cover appeared to be much lower than normal and a bit stressed. When the pool was closed, the water line was at half the skimmer level like when it's open. I went out today and looked in the skimmer and I can barely see water at the bottom of the skimmer. I called the pool company and they said it could have evaporated but I'm worried that losing 3-4 inches of water in a 20x48 pool indicates a leak. All the returns are sealed off with stand pipes. The skimmers have gizmos in them with a crushed bottle. If it's leaking I assume it would have to be the main drain? Any thoughts? If there is an issue, would the pool company be liable to repair it? Help much appreciated.