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Thread: CYA level with SWCG

  1. Back To Top    #1

    Join Date
    Aug 2007
    Southern California

    CYA level with SWCG

    Quick question. I've read to check the manufactures suggested CYA level for CYA when using a SWCG, but mine (Polaris Autoclear Plus) says to check local requirements. So is it necessary to have CYA at all when chlorine is being generated daily?
    I'm currently trying to lower the PH in the pool with MA, and I read that adding CYA will raise PH.
    Here's my test results for today.


    Thanks again.
    16x32 IG vinyl, 19,000 gal, 1.0 hp pump, sand filter, 2 returns, 1 skimmer, diving board, slide

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida
    CYA will make no really significant change in your pH.

    I have no idea what your local requirements for CYA are but most SWG's, as you know, suggest 60-80.....that's what I'd do.

    Yes, it is necessary to have CYA. Chlorine still needs protection from the sun regardles of the source.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Butterfly's Avatar
    Join Date
    May 2007
    South Carolina
    Hi Soalpool,

    Here is a Stickey by Waterbear on water balance tips for a SWG:

    Hope this helps
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    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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