Watermom, In an AGP(don't know if they make one for IGP?)situation the Aquador prevents you from wasting 4-6 inches of treated water every fall and having to replace it with untreated water in the spring. Depending on the size of the pool that could amount to hundreds of gallons of water. If the cover did seep it still would cause no damage b/c the hose to the filter is removed and the water would drip out the bottom of the skimmer. Lowering the water level would be a one time deal to install the new face plate. After that you would no longer need to drop the level. Once spring comes, hook up filter, remove cover and plug from return inlet and turn on filter, add some chemicals and you are ready to swimIt really is a great little item, IMO.
Joe
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