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Thread: CYA loss

  1. Back To Top    #1

    Join Date
    Jun 2009
    Vero Beach, FL

    CYA loss

    I seem to be loosing CYA a lot more quickly than salt. For this year I have added no salt and it has dropped from about 3500 to 3000 since January. In the same time frame I have had to add 90 ppm of CYA to keep my 60-70 level.

    Is there anything other than splashout, backwash and heavy rain overflow that can cause CYA to drop?
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

  2. Back To Top    #2

    Re: CYA loss

    I've had the same issue, CYA just vanishes, and does so faster than the salt. My pool is fine otherwise, always clear.
    17,000 Gallon plaster pool. Hayward Perflex EC65 DE Filter. 3/4 HP Hayward Superpump converted to dual speed. CircuPool RJ45. Skimmer, floor drain, two returns.

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: CYA loss

    CYA can sometimes go away during periods when FC is zero, though this is fairly uncommon.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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