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Cool. ph is 7.5 TA is 360 I'm guessing that TA level is too high. Do I need to fix this somehow before I shock? And by the way, after a night of running the filter, the water looks amazing. It's almost clear, even though I haven't added any chemicals since the second cycle of drain/refill...

Another update: I completed drain/refill cycle #2. This time I took it down to 12" in the shallow end. I estimate just over 7,000 gallons replaced. The HTH kit now says CYA is just over 50. That's progress, right?

Update: I drained about 6,500 gallons from the pool, down to 14" of depth in the shallow end. And then I replaced that water. The pool water now has sort of a greenish tint. I ordered one of the good test kits recommended here, but it won't be here for a few days. I used a cheapo strip test...

OK, so CYA may still be the issue. I'll stay with the TFP doctrine and see how it goes. I'm out of dichlor now anyway. :-) Two questions: 1. Is it even safe to drain half my pool? I was under the impression that pools needed to stay mostly full for structural reasons. I believe my pool...

I have come to regard my pool as an enemy with whom I am at war. And the pool is winning. It seems like no matter how much chlorine I put in, nothing works. I've been doing this every spring for several years now. It's time to start looking for new answers. Details: My pool is 16x32...