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Thread: CYA = not my friend

  1. Back To Top    #1

    Join Date
    Jul 2012
    Forest, VA

    CYA = not my friend

    ok after doing 1/3 to 1/2 drain of my pool my cya was about 180 (doing the 50/50 dilute test).

    drained another 1/3 today and refilling back up. I will post a full set of numbers when it is full.

    Tested before the drain (yesterday evening I added 2 182oz bottles of bleach to bring to 19ppm)

    Cl 2
    TA 130
    CH 160
    pH 7.4
    CYA ~170

    my pool is crystal clear but eating up chlorine like nobody's business. any suggestions, thoughts? fresh numbers coming later today.
    12,000 gal Octagon vinyl in-ground pool. Hayward S220 sand filter 3/4 hp pump, heat pump heater

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: CYA = not my friend

    If the FC is disappearing fast with CYA that high, there is likely something in the water consuming it.

    Once you get the CYA reasonable, perform the OCLT to determine if you should start the shock process.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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