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Thread: CYA Test

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    mitch08's Avatar
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    Jun 2008
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    Suffolk County, NY
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    CYA Test

    I want to make sure Im doing the CYA test correctly with the TF-100.
    I believe I am seeing a 40 but not 100% sure.

    When I hold the tube at waist level, am I looking down the hole into the tube until the black dot disappears? Or am I looking through the side of the tube? Cause it does change it significantly.

    I have to assume its down the hole and into the tube or why would I be holding it low... Ok so that was a dumb question. But what about the black dot... Do I want it to completely disappear to the point where I cant even see any sign of it? If so, Im at a 40.

    These tests are all great and help out a lot, but I cant always be sure Im accurate.
    Like the Ch / PH tests... I have a hard time knowing exactly which color my water is which makes a very accurate reading tough for me.

    Anyway, thanks!!!
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    frustratedpoolmom's Avatar
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    May 2007
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    SWSuburban Chicago, IL
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    Re: CYA Test

    Thru the top, completely dissappear

    do it outside in sunlight, with your back to the sun so that your body shades the view tube.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    mitch08's Avatar
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    Re: CYA Test

    Quote Originally Posted by frustratedpoolmom
    Thru the top, completely dissappear

    do it outside in sunlight, with your back to the sun so that your body shades the view tube.
    Wow, you are fast!

    Thank you very much!!! Im gonna test again later.
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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