We are finalising an inground pool - approx size 30X14 feet. We are debating on the pros & cons of installing a retractable pool cover. The contractors are giving mixed messages. There are a no. of things to consider - pool safety, cost, water temp & insulation, ease of keeping the pool clean, shape of the pool. Safety is not our biggest concern since our kids are older & good swimmers. The cost of installing solar panels vs. pool cover are comparable. We live in N. Calif. Does the water stay significantly warmer with the help of the pool cover? I know that it stays cleaner. But, won't all the new pool gadgets - pool sweeper, vaccum & filter, etc. help keep the pool clean & low-maintenance anyway? Would the salt water system corrode the rails of the automated cover? Would it help to have rails made out of brass (or is it bronze?)? I would really appreciate any advise/ experience in this regard.