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    Pool continues to have algae / green sediment on the bottom

    I have a new steel wall pool with a vinyl liner inside a greenhouse. We used it since May and have used a combination of Trichlor and Bleach. Total of 3200 grams of Trichlor. PoolMath says for a 45000 L pool it should have a CYA level of 39. The water stayed perfectly clear. I was very busy for...