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Thread: First TF-100 test results, help with next steps

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    First TF-100 test results, help with next steps

    I got my TF-100 test kit in the mail today and went to town. I'm pretty sure I know what my next steps are supposed to be, but I figured I'd post here to make sure I'm not messing anything up.

    FC .5
    CC .5
    pH low... 6.8? Whatever the lowest color is on the test tube. It might even have been lighter than that.
    TA 60
    CYA 45 (right between 40 and 50 graduated lines)
    Calcium 170 (which I gather is fine with my vinyl pool)

    Ok, so what I want to do is:

    1) Add 12lbs baking soda (per the Pool Calculator) to raise TA to 100.
    2) After step 1 how long do I wait before testing pH?
    3) Adjust pH as needed using Borax or soda ash
    4) SLAM the pool. I only say this because swimming last night I felt a small-ish slippery area on one of the side walls, and I'd like to make absolutely sure that is destroyed before it can turn into anything.


    ...am I on the right track? The guy that opened our pool used shock, but I'll be using bleach as the CYA level seems pretty decent and I want to leave it there, right?
    ~22,000 gallon IG vinyl pool, Hayward 1HP Super Pump, Hayward Pro-Grid DE filter

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    Administrator Leebo's Avatar
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    Re: First TF-100 test results, help with next steps

    What does your water look like??

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    Re: First TF-100 test results, help with next steps

    spot on. 30 min between chemicals is usually safe ... I give it an hour with anything that is in powder form (and make sure to brush well after adding it).
    TFP Moderator Chris V. ~16K Pool & Spa, 48NSF DE, IG Plaster Circa 2000, Intermatic PE653, Challenger pump with a 2 speed B2984, 20gal stenner chlorine injection, Houston, TX
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    Pool School -- Pool Math -- TF-Test Kit

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    Re: First TF-100 test results, help with next steps

    Crystal clear blue!

    I didn't mention this but the pool was just opened last week. Through the shock process from the pool guy the green swamp turned into a gorgeous sparkly blue and has stayed that way, but I still felt that slippery spot on the wall.
    ~22,000 gallon IG vinyl pool, Hayward 1HP Super Pump, Hayward Pro-Grid DE filter

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    pwrstrk's Avatar
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    Re: First TF-100 test results, help with next steps

    Adjust PH with borax. That will raise TA slightly. You need to get the FC up. For your CYA level keep it between 4-8 ppm.

    If your water is clear you can do an OCLT test pool-school/overnight_fc_test
    To see if something is consuming your chlorine.

    CYA level is good. No higher.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Mod Squad woodyp's Avatar
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    Re: First TF-100 test results, help with next steps

    Get your FC in range for your CYA level at the high end to start first. Then brush it. You may avoid SLAMming it just because you have a slick spot.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Re: First TF-100 test results, help with next steps

    Quote Originally Posted by woodyp
    Get your FC in range for your CYA level at the high end to start first. Then brush it. You may avoid SLAMming it just because you have a slick spot.
    Oh that's good news. I'll try this, and the overnight test that pwrstrk posted. If I fail that I'll know something is up.

    Thanks for the advice, glad to know I'm not completely off base! I might get the hang of this pool thing after all
    ~22,000 gallon IG vinyl pool, Hayward 1HP Super Pump, Hayward Pro-Grid DE filter

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    Administrator Leebo's Avatar
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    Re: First TF-100 test results, help with next steps

    To add what woody stated.....

    Get your PH up ASAP. No need to leave it that low.

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    pwrstrk's Avatar
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    Re: First TF-100 test results, help with next steps

    Correct. Good job !


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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