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Thread: PH Slowly Increasing

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    PH Slowly Increasing

    FC = 4
    CC = 0
    PH 7.8 - 8.2

    Why does the PH keep rising? What do I do to lower the PH? The PH has been slowly rising for the past few weeks since opening. My pool is crystal clear. Thoughts?


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

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    Re: PH Slowly Increasing

    Why does the PH keep rising?
    For a variety of reasons, it is the nature of almost all pools. You can learn how to lower it correctly by reading "The ABC's of Pool Water Chemistry" up in Pool School
    Dave S. - Forum owner
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    JasonLion's Avatar
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    Re: PH Slowly Increasing

    There are a number of common reasons for the PH to rise. The most common is some combination of high TA and aeration. When the TA is too high, any aeration (fountain, waterfall, SWG, etc) will cause the PH to go up.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: PH Slowly Increasing

    Thanks! Will a PH of 8.2 hurt a vinyl liner or equipment? I just measured my TA (100).


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

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    JasonLion's Avatar
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    Re: PH Slowly Increasing

    The largest problem with PH at 8.2 is that it is as high as the PH test reads. If the PH were say 9.0, it would still read as 8.2. So 8.2 isn't safe because it might actually mean the PH is much higher.
    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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    Richard320's Avatar
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    Re: PH Slowly Increasing

    It would help if you could post all the test results.

    If your TA is high, that will drive pH up rapidly. And if the fill water is high in TA, every top-off makes it worse. And the SWG accelerates it.
    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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    Re: PH Slowly Increasing

    So I should use the pool calculator to determine how much muriatic acid I should use. Any method to pour it in? Does the acid go bad? I'm asking because I have a jug from 1999 (washed brick).


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

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    Re: PH Slowly Increasing

    Richard320, my TA was 100. I will test my fill water now. Thanks!


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

  9. Back To Top    #9

    Re: PH Slowly Increasing

    Our tap water that I use to fill the pool had a TA of 140-150 with a PH of 7.2


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

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    Richard320's Avatar
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    Re: PH Slowly Increasing

    Just dribble the acid in front of one of the returns while the pump is on. http://www.troublefreepool.com/conte...pool-chemicals tells how to add each chemical.

    Your old jug of acid should be fine. The acid doesn't go bad, but the jugs can get brittle with age. Wear old clothes.
    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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    Re: PH Slowly Increasing

    Thanks! How soon after I add can we swim?


    20 x 44.5 single roman end, ~33,000 gallons, 10 feet deep, garrett vinyl liner, Hayward SwimClear Cartridge Filter, Hayward 2 HP Pump, Cirrcupool RJ60 SWG, Hayward 140k BTU Heater, Polaris 380 with Booster Pump
    20x44.5 (3.5 feet SE, 10 feet DE), IG, Vinyl, Hayward Cartridge (C4030), 2HP Hayward Super Pump (SP2615X20), 2 main drains, 5 returns, Hayward ColorLogic 4.0, Circu Pool RJ60 SWG, Hayward Heat Pro 140K BTU, Polaris 380, Polaris Booster Pump (PB4-60),

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    Richard320's Avatar
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    Re: PH Slowly Increasing

    Quote Originally Posted by Drsafety View Post
    Thanks! How soon after I add can we swim?
    Put the jug away, go change into your swim suit, and jump in. Swimmers will finish dispersing the acid.
    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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