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FC = 4.5 CC = 0.5 pH = 7.6 TA = 80 CH = 40 CYA = 35 I recently purchased a house with a pool that had not been opened the previous season. It was almost black when I started but thanks to this site I have started on the right path. I ordered K-2006 and stocked up on 12.5% chlorine. Following...