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Thread: New pool -pH

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    New pool -pH

    a general question...
    Pebble tec SW pool. Is it normal to be battling pH two months in? Rises to 8, add 2 pts acid, back to 7.5. Few days later back to 8.
    Learning to Manage
    10.5K Alpine Blue Pebble Sheen with a dash of abalone
    Hayward AquaRite, ProGrid 4820 DE, SP II

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    Re: New pool -pH

    pretty normal. Your SWG is also a source of rising PH so it's a double whammy.

    What is your TA level?
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

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    Re: New pool -pH

    Welcome to the forum Yeah, pretty normal. It may help you go a little longer between additions to take it down to 7.0 - 7.2 and let it go up to 7.8 before adding. 8.0 is a little outside the range of where you should be.

    Lightninguy has another good idea for you, too. Keeping your TA low can be helpful. Report your current reading.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: New pool -pH

    I'm at 7.5 months and my pH is still rising. I'm going through a gallon of MA every 7-10 days. I'm told that lowering the TA to 70 or even 60 should help. I'm at 70 now and I'm hoping the rise in pH will slow down.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
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    Re: New pool -pH

    Thanks for the input.

    I should add that I'm not comfortable with SWG output. Initial set up @ 45. I seeing a rise in Cl and pH since last addition of acid.
    Checking NaCl between Leslies, P-a-P analysis, and Aquacheck strips. SWG is reading higher (approx 400 ppm) than the freebees. The Strip tests more in line with the outside analysis. Any thoughts?
    Learning to Manage
    10.5K Alpine Blue Pebble Sheen with a dash of abalone
    Hayward AquaRite, ProGrid 4820 DE, SP II

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    JasonLion's Avatar
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    Re: New pool -pH

    Salt tests are all fairly imprecise, getting results that agree within 400 is doing fairly well.

    Fresh plaster will continue to increase PH, TA, and CH levels for up to a year.

    What is your current TA level?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: New pool -pH

    Fresh Tests (TF-100)
    ph 8.2
    FC 3.5
    CC 0
    TA 80
    CA 320
    CYA 50
    NaCl 2700
    Temp 90
    Reduced SWG output to 35% this AM. Cl up .5
    Learning to Manage
    10.5K Alpine Blue Pebble Sheen with a dash of abalone
    Hayward AquaRite, ProGrid 4820 DE, SP II

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    Re: New pool -pH

    Keep that pH below 8.0

    Trust your own testing and assume yours is the most accurate.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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