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Thread: First time testing with Tf100 kit

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    Join Date
    Oct 2013
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    First time testing with Tf100 kit

    I tested my pool with the tf100 for the first time today and i was confused with the cya test. We need to have our back to the sun right? When i did this there was my shadow over the test tube which give me a higher cya readinh of 70. But when moved and let the sunlight hit the testtube the cya went down to 40 before i could no longer see the dot. Which method is right for testing cya ? Thank you for the replys =]
    Intex 12 by 24, Intex 2600 sand filter (soon to upgrade), deck under construction

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    JasonLion's Avatar
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    May 2007
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    Re: First time testing with Tf100 kit

    The test is calibrated for full sunlight with the view tube in the shadow of your body (sun to your back).
    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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    Re: First time testing with Tf100 kit

    So then my cya should be 70 right ?
    Intex 12 by 24, Intex 2600 sand filter (soon to upgrade), deck under construction

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    JasonLion's Avatar
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    Re: First time testing with Tf100 kit

    Yes, based on your description, your CYA is 70.
    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

  5. Back To Top    #5

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    Oct 2013
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    Re: First time testing with Tf100 kit

    Thank you for the clarification
    Intex 12 by 24, Intex 2600 sand filter (soon to upgrade), deck under construction

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