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  1. J

    Calcium Hardness Stays High

    I recently let go of our pool service. I did it before, but thought the service could do a better job with the start up after a new plaster job about 3 years ago. After a week of no service I began testing with a fresh test kit and came up with the following: FC - 7.5, CH 1150, TA 70, CYA 70...