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Thread: PH level question

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    PH level question

    Ph 7.2 to 7.8

    Was wonder why you guys lean to the higher side? 7.5 to 7.8?

    Thanks
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    duraleigh's Avatar
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    Re: PH level question

    I'm not really sure what you are asking but the most often suggested guidelines are 7.2 - 7.8. You may see a little variance for one reason or another but all should fall in this range and ANYTHING in this range is normal.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: PH level question

    Pool school recommended level is 7.5 to 7.8, so was wondering why they lean to the high side?

    pool-school/recommended_levels
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    Richard320's Avatar
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    Re: PH level question

    You'll see us recommend people drop it to the low end when they are complaining about high TA or rapid pH rise. Not that there's any great advantage to the lower pH - it just means the interval to add acid is a little longer.
    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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    JasonLion's Avatar
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    Re: PH level question

    It has to do with the rate of PH drift. PH drift from CO2 outgassing is much faster when the PH is lower. Keeping the PH in the top half of the range minimizes the PH drift.
    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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    Re: PH level question

    So is it ok to keep my ph at 7.2 to 7.3 instead of 7.5?

    My stains disappear at the lower ph
    15,000 gallon inground fiberglass pool with spa. 350lb Sand filter, 1.5 hp pump, and heater

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    JasonLion's Avatar
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    Re: PH level question

    That depends on how much of an issue PH drift is for you. Swimming is fine down to 7.2, as is your equipment. Bu the PH is less stable when it is lower.
    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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