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    Greenish Tint Backwash Brown with Brown Stains on Steps

    I have a 30,000 Gal. Liner pool. I opened a swamp 4 weeks ago. Shocked the pool to kill algee. The water cleared in about a week yet it was not holding chlorine. So I found this site and saw my CYA was real high. I did several partial drain and fills getting the CYA down to 78ppm. Shocked with...