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Thread: TF-100 question

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    Join Date
    May 2014
    Norfolk, VA

    TF-100 question

    Hi. I am just starting out testing my own water when I opened today and used the TF-100 for the first time today when opening my 18' AG. When using the TA test once I did step 2 with R-0007 and then R-0008 my solution was already red instead of green. This was before step 3. I ran the test three different times about 2 hours apart and still have the same results. Can anyone please tell me what I need to do to fix this?

    Ph-too low to tell
    7500 gallon AG
    Sand Filter

  2. Back To Top    #2
    Administrator Leebo's Avatar
    Join Date
    Jul 2011
    Eastern Ohio

    Re: TF-100 question

    What have you used to chlorinate your water?? You need to raise your pH up to at least 7 to avoid damaging various items. Your TA is very low to zero at this point. Here's a quote from the Extended Test Directions.

    Add 5 drops of R-0008 and swirl to mix. The solution should turn green or blue. If the sample turns red, pink, or yellow, you are done, your TA is zero, and your PH is very very low.

  3. Back To Top    #3

    Join Date
    Jun 2013

    Re: TF-100 question

    so using the pool math calculator at you need to add borax to raise the PH and baking soda to raise the TA
    IG plaster, 22,000 gallon, Jacuzzi Laser Sand filter

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: TF-100 question

    Slow down!

    And welcome

    If the water hasn't had a chance to circulate and mix, you might just be testing a layer of snowmelt, which of course will be free of alkalinity. So don't start tossing stuff in the pool if the water hasn't had a chance to mix well!!

    If those reading are accurate, then you need to add some alkalinity with Baking soda, target maybe 50, then recheck pH and TA after it's mixed for a good hour, and then raise pH with Borax. Let that mix, and recheck your numbers again. It may take a few adjustments to get things right.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    elwood58's Avatar
    Join Date
    May 2012
    Sun City West Arizona (2nd Home)

    Re: TF-100 question

    A layer of snow melt would not have a CYA of 50, but Richard is right, you need to let things mix well to avoid over adjustment. Getting that PH up above 7 is critical.
    14100 Gal IG MiniPebble, Pentair Intellichlor IC-40 SWG, Sand Filter, Pop Up Cleaning, Intelliflo VS Pump, Aquacal Heatpump/Chiller, 1/4 Acre Desert Landscaped, Lots of Deck. Built in 1984, updated in 2012 and 2014
    "If you don't measure it, you can't manage it!"

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