Thanks, Janet. I sucked up some with a turkey baster and put it in a glass. After settling overnight, it seems to be sand. I was thinking about this sand thing. When I took the cover off before the pump had even been run, all of this stuff was there. Maybe the gasket is letting some blow in but maybe most of it was already there. Last year when I replaced the sand in the filter, I dumped the old sand in a pile at the edge of some trees which is only about 30 feet from the pool. Maybe a lot of this sand was blown in from that pile over the winter and spring before I opened the pool. I'm going to wait for my gasket to get here and then see how it goes. Hopefully I don't have to tear into the filter again.
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