Ben, i tried lowering the PH to 7.0 for a couple of days to burn off calcium, but that did not help, so I think you are right (and I am wrong) about it being a mix of calcium and baking soda that is causing the cloudy water. Last night I added the 60% poly, ran the pump for 4 hours on recirculate, then shut it off. This afternoon it finally looks like the water is clearing up - I can see the bottom for the first time in two weeks and it appears there are little piles of debris. I will wait a few more hours to see if the water continues to clear, and the as you said, I will vacuum to waste. Thanks very much for all of your advice! Seems like 60% poly works better as a clarifier then the stuff that is sold as a clarifier.
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