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Thread: Question on CYA and Calcium Hardness

  1. Back To Top    #1

    Join Date
    Sep 2015
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    York pa
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    Question on CYA and Calcium Hardness

    Will the CYA or Calcium Hardness level ever go down naturally? Is replacing the water the only way to achieve that goal?
    25K, IG vinyl, sand filter, 10 yrs old, TF100 test kit, elec htr

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
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    May 2014
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    Franklin, NC
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    Re: Question on CYA and Calcium Hardness

    CYA naturally degrades very slowly, maybe 1-2ppm per month.

    Calcium is a mineral and it just sticks around.
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