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Thread: Current measurements--Questions about CYA and TA

  1. Back To Top    #1

    Join Date
    Jul 2011
    Lehigh Valley, PA

    Current measurements--Questions about CYA and TA

    Added a pound of shock last night to raise the FC and the CYA

    Pool looks pretty darn blue.
    Two questions. I have the TF-100 kit.
    1) When you do the CYA test are you supposed to wait till you totally cant see the black dot at all ?
    2) For the TA test, I know it says to add drops until it becomes RED--but mine just turns a dark pink no matter how many drops I add. Is this correct ?
    21' All Steel AGP with Resin caps, Heyward S244T Sand Filter, Heyward 1HP 2 speed pump

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Current measurements--Questions about CYA and TA

    1) Correct, totally not at all there even if you stare at it for a few seconds.
    2) Anything in the red/pink family will do. Add drops till it start to turn red/pink. Then keep adding drops as long as the color continues to change. The final drop, which does not change the color any further, does not count.
    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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