Thanks watermom. Took the cover off yesterday. With the exeption of a few dirt clods here and there and about 20 earthworms (dead of course) The water is as beautiful as when the cover went on. Can you explain the order of starting the pump/filter. Do I need to vacuum and brush if its this clean? If not or if so then how long do I need to backwash and rinse before I start circulation. I have to circulate 24 hours w/ the new H2O before my pool person wants a sample, but I'm ready to get on with the program. HELP!