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Thread: Is it possible to 6.0 FC at opening?

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    GVracer's Avatar
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    Is it possible to 6.0 FC at opening?

    Just took off the winter cover to nice clear water Added water, have been running the filter for about 3 hours and here are my numbers:

    FC: 6
    CC: 0
    pH: 7.2
    T/A: 190
    CH: 170
    CYA: 30
    Temp: 55F

    Is it possible to have that much FC since closing in October? I don't know what the FC was at closing because I didn't have my TF100. I do now I need to lower my T/A. Should I do that and add CYA first?

    Thank you for your help. TFP is the best!
    Mike
    18' x 48" Intex Metal Frame 6700g, Hayward DE filter, Hayward Power-Flo LX 40gpm, 2x 2x40 solar panels
    Re-plumbed with combo of 1-1/2" PVC and flex hoses
    TF-100 & BBB user (Thanks to TFP)

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    JasonLion's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    Congratulations!

    Yes, raising CYA a little and lowering TA a little are both good projects. You do know that you don't need to lower your TA unless you tend to have problems with the PH rising.
    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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    frustratedpoolmom's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    Quote Originally Posted by GVracer
    Is it possible to have that much FC since closing in October?
    Yup. I had a 3.5 residual, and I closed in September.

    Isn't opening to clear water and NOT having to shock...the BEST!
    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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    GVracer's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    Quote Originally Posted by JasonLion
    You do know that you don't need to lower your TA unless you tend to have problems with the PH rising.
    Thank you. I didn't know that about the TA. If I was wanting to lower the TA could I just aerate without adding acid since the pH is a little low already?

    I will work on bringing the CYA up.

    Thanks,
    Mike
    18' x 48" Intex Metal Frame 6700g, Hayward DE filter, Hayward Power-Flo LX 40gpm, 2x 2x40 solar panels
    Re-plumbed with combo of 1-1/2" PVC and flex hoses
    TF-100 & BBB user (Thanks to TFP)

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    GVracer's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    Quote Originally Posted by frustratedpoolmom
    Yup. I had a 3.5 residual, and I closed in September.

    Isn't opening to clear water and NOT having to shock...the BEST!
    WOW. I'll say. We set this pool up for the first time last summer, so this was the first time I had ever tried closing a pool for the winter. Can you say "Beginners Luck"
    18' x 48" Intex Metal Frame 6700g, Hayward DE filter, Hayward Power-Flo LX 40gpm, 2x 2x40 solar panels
    Re-plumbed with combo of 1-1/2" PVC and flex hoses
    TF-100 & BBB user (Thanks to TFP)

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    JasonLion's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    I would leave the PH alone and let it come up in it's own time. PH of 7.2 and higher are good to swim. When the PH gets up to 7.8, lower it back down to 7.2 again. If you keep doing that, over time your TA level will come down. Keep it simple, don't bother with things you don't need to bother with.

    If the PH starts rising quickly enough that it is annoying, then you can do the whole lowering TA routine.
    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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    GVracer's Avatar
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    Re: Is it possible to 6.0 FC at opening?

    Thanks for your help. TFP Rocks
    18' x 48" Intex Metal Frame 6700g, Hayward DE filter, Hayward Power-Flo LX 40gpm, 2x 2x40 solar panels
    Re-plumbed with combo of 1-1/2" PVC and flex hoses
    TF-100 & BBB user (Thanks to TFP)

  8. Back To Top    #8
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    Re: Is it possible to 6.0 FC at opening?

    Just to clarify...
    adding acid lowers TA
    Aerating raises pH without causing TA to rise back up like adding a pH increasing chemical will

    If you want to know the why and how read these two theads but I caution you that it's chemistry nerd stuff!
    ta-what-is-it-really-t4979.html
    how-to-lower-ta-t5341.html

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