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Thread: Can't keep PH down, in semi new pool.

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    zephard's Avatar
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    Can't keep PH down, in semi new pool.

    The situation, every 3 days my PH is reading above 8.2. So I lower it with Muriatic Acid.

    It like shoots up in a couple of days. Put water in the pool on August 6th. Its now been 2 months and I just can't keep the PH down.

    I add 4 cups of the acid and the PH will be down to 7.2. The TA is around 110.

    Any ideas?
    Pool: IG, 8'W x20'L x5' deep, 6000 gallons, Stonescapes Blue Tropics Mini-Pebble gunite pool
    Equipment: Hayward SwimClear 3030 cartridge filter, SP32102EE Tristar 1 HP 2-speed pump,
    Universal H-Series Low NOx H400FDN (400K BTU) heater, SWG = Hayward Aqua
    Rite with Turbo Cell 9, and a Navigator XL cleaner
    Ground break 7/12/2013 Filled 8/6/2013

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    Mod Squad jblizzle's Avatar
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    Re: Can't keep PH down, in semi new pool.

    Just keep adding acid.

    The surface of a new pool can result in the pH rising, although I thought pebble did it less so than basic plaster. The SWG will also cause the pH to rise, so what you are seeing is not totally unexpected.

    Do you also have any water features? They would also cause the pH to rise.

    As you continually lower the pH, your TA should slowly come down which may help.

    What is the pH and TA (while you are at it CH) of your top-off water?
    Jason, TFP Moderator
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    zephard's Avatar
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    Re: Can't keep PH down, in semi new pool.

    Going to get the SWG running today, there had been a leak in the pool, so I never got them to start up the SWG. I just kept adding chlorine in myself. The leak was dumping about 3/4 inch out of the pool in 24 hours. It was finally found and fixed last Friday. Grout crack next to skimmer.

    Don't have any water features, or spa. Just a nice little rectangular pool, that gets full sun form 10 am til sunset.

    Straight from the tap:
    Cl = 3,
    pH = 7.5
    TA = 170
    CH = 180
    Pool: IG, 8'W x20'L x5' deep, 6000 gallons, Stonescapes Blue Tropics Mini-Pebble gunite pool
    Equipment: Hayward SwimClear 3030 cartridge filter, SP32102EE Tristar 1 HP 2-speed pump,
    Universal H-Series Low NOx H400FDN (400K BTU) heater, SWG = Hayward Aqua
    Rite with Turbo Cell 9, and a Navigator XL cleaner
    Ground break 7/12/2013 Filled 8/6/2013

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    Patrick_B's Avatar
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    Re: Can't keep PH down, in semi new pool.

    Yea, I think jblizzle has you covered, just stay on top of acid addtions and it will come on down. Just to be sure, don't run your pH test with the K-1000 when the FC is 10 PPM or higher. It skews to the high side.
    TFP Moderator
    Essential Links:
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    ComputerGuyInNOLA's Avatar
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    Re: Can't keep PH down, in semi new pool.

    My pool is just hitting one year old and finally my PH rise is slowing. It still rises due to two waterfalls and a SWCG but it has slowed down.
    Gunite/Plaster pool at 13k gallons. All Jandy with CL340 series cartridge filter, 1.5 HP Jandy Stealth pump. Jandy 1400 SWCG and PDA4 controller. Dual waterfalls. Polaris 280. Pool installed August 2012. Southern Louisiana. And lets not forget my trusty TF100 test kit!

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    zephard's Avatar
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    Re: Can't keep PH down, in semi new pool.

    Thanks,

    I keep putting in the acid.
    Pool: IG, 8'W x20'L x5' deep, 6000 gallons, Stonescapes Blue Tropics Mini-Pebble gunite pool
    Equipment: Hayward SwimClear 3030 cartridge filter, SP32102EE Tristar 1 HP 2-speed pump,
    Universal H-Series Low NOx H400FDN (400K BTU) heater, SWG = Hayward Aqua
    Rite with Turbo Cell 9, and a Navigator XL cleaner
    Ground break 7/12/2013 Filled 8/6/2013

  7. Back To Top    #7
    Patrick_B's Avatar
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    Re: Can't keep PH down, in semi new pool.

    Let us know how it goes, just be patient and it will come around. Good thing is your pool won't take that much at a time.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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