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I started a trial of Bio-Active in my pool this morning, and per Divin' Dave's request I'm starting this thread to track progress. Baseline chemistry at 9pm last night: FC < .2 CC < .2 pH 7.4 TA 150 CH 340 CYA 140 (1:1 dilution with tap water) Added 128oz 10% chlorine at 9:30pm last night to...

New to TFP, but been reading through threads and wishing I'd developed this obsession a few years ago. We have a 35,000 gal in-ground plaster pool built in around '74. We bought the house in foreclosure in 2008, and while the pool was clear when we bought it, that was courtesy of the bank...