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Thread: pH just shot up

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    clmsntiger1's Avatar
    Join Date
    Apr 2016
    Location
    Lexington, KY
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    22

    pH just shot up

    I've got a situation that I can't figure out. This is my first summer with a pool and using the TFPC method. So far I've been able to keep my pH consistent for the last couple months with little maintenance. It always slowing drops and I add borax from time to time to raise it, it's never gone high until now. I tested yesterday and today and my pH was 8.2, before that it was always around 7.6. I do not have any aerators on/in the pool. We've had an excess of rain the last couple days but I thought that was supposed to lower the pH. What could have caused it to rise so quickly?

    Current results taken this morning
    FC - 11 (raised it to clean my solar cover)
    CC - 0
    pH - 8.2
    TA - 90
    CYA - 60
    CH -100
    16x32, IG, vinyl, 23,500 gallons with Hayward S-244T sand filter,
    1.65 HP VS Pump, using TF-100 test kit

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    Join Date
    Mar 2016
    Location
    Corpus Christi
    Posts
    20

    Re: pH just shot up

    NOT AN EXPERT!
    Ph tests are unreliable at higher chlorine levels. Basically anything above 10 FC. I'd wait until the FC levels are below 10ppm and restest the PH.
    Intex ultraframe 22" round 52 inches
    Intex 3000 gph sand filter 3/4hp pump
    Taylor test kit atm( upgrading to tft100)

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    JamieP's Avatar
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    May 2011
    Location
    Waxahachie, TX (south of Dallas)
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    1,135

    Re: pH just shot up

    Aside from the inaccuracy of testing PH with a high FC, rain causes lots of aeration so can raise PH too.
    28,000 gallon freeform, Stonescapes Tropics Blue Minipebble with abalone, 3.5' to 8.5' depth. 2 skimmers, 5 returns, dedicated vacuum port, Dolphin Z5 robot. All Pentair equip: EasyTouch 8, IC60 SWG, VS pump, 520 Cartridge Filter, 3 Intellibrites, 2 Color Cascade Bubblers. TurboTwister Slide and 8' Salt System Jump Board. TF-100. My Jan-Mar 2016 build:
    Waxahachie, TX Owner Build - A race to beat the baby!!

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    clmsntiger1's Avatar
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    Apr 2016
    Location
    Lexington, KY
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    22

    Re: pH just shot up

    Thanks for the responses! I'm gonna head to Lowes and pick up some
    muriatic acid because I don't have any on hand. I'll wait to add it until my FC drops further to be more accurate.

    16x32, IG, vinyl, 23,500 gallons with Hayward S-244T sand filter,
    1.65 HP VS Pump, using TF-100 test kit

  5. Back To Top    #5

    Join Date
    May 2016
    Location
    Cincinnati, OH
    Posts
    381

    Re: pH just shot up

    Hello fellow Tiger! Yes, I would wait for chlorine to drop and retest pH before doing anything about it.
    30000 gal inground vinyl liner;sand filter w/glass media, nuvo uv, TF-100 test kit; 25 years on Baquacil, converted to TFP chlorine in 2016

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