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Thread: How accurate is my PH reading .... FC = 14

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    ship of fools's Avatar
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    How accurate is my PH reading .... FC = 14

    My pool finally cooled down here in upstate NY and i am getting ready to close ..... without even thinking about it i dumped the remainder of a 5 gallon jug of chlorine in and started scooping leaves etc out.

    As i am getting it cleared up i decided to check the PH and it is at 8.2.

    FC is 14
    CC is .5 or less

    As a general rule the PH was fairly stable all season and only crept up slightly all summer.

    I haven't done much of anything with it since early September other than a gallon of bleach here and there and run the pump once a week.

    Can i trust that reading and add MA?
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

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    pwrstrk's Avatar
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    Re: How accurate is my PH reading .... FC = 14

    No. Your PH will read a false high with FC levels of 10 or above.
    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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    ship of fools's Avatar
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    Re: How accurate is my PH reading .... FC = 14

    I was afraid i would hear that

    In the meantime i searched on here and came to the same conclusion.

    The only workaround seemed to possibly mix 50/50 with distilled water... is that worth doing?

    Will FC still drop over the next week or so (pool temp is 50+-) and i can easily wait another week if needed.
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

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    pwrstrk's Avatar
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    Re: How accurate is my PH reading .... FC = 14

    What is your PH level normally ?
    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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    ship of fools's Avatar
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    Re: How accurate is my PH reading .... FC = 14

    Quote Originally Posted by pwrstrk
    What is your PH level normally ?
    7.6 to maybe 7.8 or so

    I had to add a small amount of MA once all summer.

    I've waited this long so the water would cool (it stayed over 60 well into October) and i definitely don't need to rush it if i risk making a mistake.
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

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    pwrstrk's Avatar
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    How accurate is my PH reading .... FC = 14

    I don't think its a big deal. With your water temp low and a high FC level it's going to take a long time for the FC level to come down. Is the pool covered ? Might come down faster if it's not covered.

    I wouldn't sweat it !
    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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    Re: How accurate is my PH reading .... FC = 14

    Can you post all of your readings?

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    ship of fools's Avatar
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    Re: How accurate is my PH reading .... FC = 14

    Quote Originally Posted by JamesW
    Can you post all of your readings?

    Nope

    I read up on the impact of high ph (i think it is in range anyway) and with a vinyl pool and no equipment hooked up it didn't seem like much of an issue.

    So ... it's all closed up now
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

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