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I’m hoping for some answers! Several months ago we switched our broken DE filter to a new sand filter on our pool. About a month ago, I noticed when I dumped some chlorine granules in the skimmer, a few seconds later it seemed to be coming out in cloudy white water through one of the jets in...

I'm at a loss here, as I have dumped huge amounts of granular chlorine (power powder, the kind without stabilizer) in my pool yesterday, tested the water an hour later and the chlorine was at ZERO. This morning I took a water sample to the pool store and got this: FAC 0 pH 7.4 Alk 80 TDS 1200...