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Thread: How much muriatic acid to add??

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    MikeInTN's Avatar
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    May 2007
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    How much muriatic acid to add??

    Hello all,

    My PH is starting to creep up (7.6), so I'm pretty sure I'm going to need to add some acid here shortly. Is there a chart or formula to determine how much acid to add to drop the PH a certain amount??

    Thanks in advance for your help!

    Mike
    24' x 52" AGP - approx 13,500 gallons
    Pentair Optiflo 1 hp/2sp pump w/ Swimpro Voyager 150 sq ft cartridge filter
    Intex 8110 SWCG
    "Fear the Schnauz!"

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    duraleigh's Avatar
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    Re: How much muriatic acid to add??

    Quote Originally Posted by MikeInTN
    Hello all,

    My PH is starting to creep up (7.6), so I'm pretty sure I'm going to need to add some acid here shortly. Is there a chart or formula to determine how much acid to add to drop the PH a certain amount??

    Thanks in advance for your help!

    Mike
    Mike, download bleachcalc and put it on your desktop...it'll do many calcs for you, including pH.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Join Date
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    Houston, TX
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    Re: How much muriatic acid to add??

    Quote Originally Posted by MikeInTN
    Hello all,

    My PH is starting to creep up (7.6), so I'm pretty sure I'm going to need to add some acid here shortly. Is there a chart or formula to determine how much acid to add to drop the PH a certain amount??

    Thanks in advance for your help!

    Mike
    Yes bleachcalc is your friend. 1oz of 31% muriatic acid per 1250 gallons to lower pH by .2. Not sure how many gallons your pool is but that should give you an idea.

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    MikeInTN's Avatar
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    Ahhh, nothing like some self-inflicted stupidity to humble oneself - I had already downloaded the bleachcalc program, but didn't fully investigate the other calculations this program provides.

    Thanks to those that replied!

    Mike
    24' x 52" AGP - approx 13,500 gallons
    Pentair Optiflo 1 hp/2sp pump w/ Swimpro Voyager 150 sq ft cartridge filter
    Intex 8110 SWCG
    "Fear the Schnauz!"

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