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Thread: New results from my TF100 kit

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    New results from my TF100 kit

    I ran a bit of a test today. I pulled three separate samples of pool water and brought it to both of my pool stores and my TF kit. It's interesting how much these can vary.

    My results (TF-100)

    FC - 5
    CC - 1
    TC - 3
    ph - 6.8
    T/A - 100
    CH - 320
    CYA - 90
    Temp - 81 degrees


    Pinch A Penny # 1

    FC - 5
    CC - 3
    TC - 4
    ph - 7.0
    T/A - 120
    CH - 300
    CYA - 95


    Pinch A Penny # 2

    FC - 4
    CC - 3
    TC - 3
    ph - 6.8
    T/A - 100
    CH - 320
    CYA - 90


    So... let's assume the results from my test were most accurate (as I took them several times from the same sample to ensure I was doing it right). What's next for my pool water?

    Denis
    Clearwater, Florida

    12,000 gallon kidney shaped gunite pool
    Pentair Whisperflo 3/4HP Pump
    Pentair CCP420 420sq/ft Cartridge Filter
    Pentair Intellibrite 5G 120V Pool Light

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    Re: New results from my TF100 kit

    Your PH is too low. You want to raise PH to at least 7.2 soon. Since your TA is a little high, it is best to raise the PH only to 7.2 or so and then let it drift up on it's own from there, with a longer term target of 7.5 to 7.7.

    With CYA around 90 you need to keep FC between 7 and 12. I would aim for the upper end of that range to start with. Hopefully that will take care of your CC level. If the CC level doesn't come down to 0.5 or lower in the next day or two you will need to shock the pool. Longer term you want to get the CYA level down. With CYA at 90 it will be difficult to fight algae, should you get any. CYA tends to drift down slowly, so you could wait, at the risk of problems if you get algae, or you might want to replace some water to get the CYA level down now.

    CH is good where it is.
    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

  3. Back To Top    #3

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    28,394

    Re: New results from my TF100 kit

    Denis,

    I assume you took that TC test with the test block that came out of the blue plastic box....the OTO chlorine test. Use that one to check FC daily but it's not very accurate. use it just to reassure that you have chlorine.

    When you perform the FAS/DPD chlorine test, your results will be like this....

    FC - 5
    CC - 1
    TC - 6 (TC will always be the total of FC and CC)
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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