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Thread: big uh-oh - added 1 gal of muriatic acid instead of bleach

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    big uh-oh - added 1 gal of muriatic acid instead of bleach

    SWG, 23,000 gal inground vinyl swimming pool.
    I checked today and my chlorine was .5-1 on the basic test. I looked at Aquarite and it said my salt level was 2300 and to check the cell, add salt. I stopped the swg and went to pour in two gallons of chlorine. I added the first gallon, then when I finished adding the second, I noticed that I grabbed the wrong jug and added 1 gallon of muriactic acid. Other than my ph dropping, should I be concerned. I am not letting anyone swim in the pool until I hear back. Kids are ****** at my stupidity!!!

    Thanks,
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Too low pH can be damaging to pool and equipment.

    What was pH before you added the MA?

    [s29gyf12]How many gallons is your pool?[/s29gyf12]

    What is pH testing now?
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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    before 7.2, now(1/2 hour later) 7.2
    I have borax to add if you think?
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    If the 7.2 was before the gallon of MA, then:

    You can use the PoolCalculator.com and add enough borax to get the pH back into the low to mid 7's.

    Check the TA, too. It should be between 60 to 80ish.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    thank you for your help!!!!
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Quote Originally Posted by brianmac
    before 7.2, now(1/2 hour later) 7.2
    I have borax to add if you think?
    One of those tests seems to be incorrect. I suggest you retest now.

    If pH is below 7, get it to the 7.4ish range.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    retested, 6.8
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Just wondering how did u get 6.8 ? I have the TF-100 kit and I thought it only goes down to like 7.0 on the scale? unless I am not remembering right
    34000 Gallon Salt Water Pool, Jandy AquaPure 1400 SWG, Jandy Del60 Filter, Polaris 380 Cleaner

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    I have the TF-100, in the basic taylor K-1000 that comes with the tf-100, the PH goes down to 6.8....
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Quote Originally Posted by brianmac
    I have the TF-100, in the basic taylor K-1000 that comes with the tf-100, the PH goes down to 6.8....
    ok I must just not be remembering right then cuz i have the same test.
    34000 Gallon Salt Water Pool, Jandy AquaPure 1400 SWG, Jandy Del60 Filter, Polaris 380 Cleaner

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    The most important thing to do immediately is to brush the side and bottom of the pool where you added the acid to ensure thorough mixing. If the acid pools at the bottom, it can damage your vinyl liner. Then get the pH back up reasonably soon.

    The pH is probably below 6.8. If I start with a pH of 7.2, TA of 70 ppm, CYA of 80 ppm and I add one gallon of full-strength Muriatic Acid (31.45% Hydrochloric Acid) to 23,000 gallons, the pH will get lowered to 6.6 though there will be a lot of carbon dioxide outgassing so perhaps it won't get quite that low by the time you next measure it. Anyway, it will take 3-1/2 76-ounce boxes of 20 Mule Team Borax to bring you back to the original pH (and this will add 10 ppm borates to the pool). Or it will take 8 pounds (about 14 cups) of soda ash (pH Up; sodium carbonate; washing soda) though that will increase the TA by 18 ppm.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    I have had my automatic vacuum running all day, so it should take care of the pooling factor - I hope. I already added 3 boxes of 20 mule and am checking ph every 2-3 hours...
    Thanks,
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Quote Originally Posted by brianmac
    I have had my automatic vacuum running all day, so it should take care of the pooling factor - I hope. I already added 3 boxes of 20 mule and am checking ph every 2-3 hours...
    Thanks,
    Brian
    So, we hope you got the pH back in range earlier, right?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    just checked PH - 7.2 after 4 boxes of 20 mule borax(thorough day). I just dumped one more box to boost it up. I also added another gallon of bleach to get chlorine up(did this separate(1/2 hour) and always premix borax with water then walk it around pool). It's still in .5 -1 range. SWG still showing 2300, which seems extremely low for me and have it off position. Will get chlorine back up and then tackle swg issue.

    Thanks,
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    This morning, PH 7.4-7.5, TA 70, chlorine 4...

    Thanks for all the help!

    Now does anyone have hooked on phonics for me? Might help me to read the labels.....

    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    MA should be stored away from other chemicals. Especially do not store MA near a chlorine product. If MA and chlorine come in contact, it can kaboom.

    It is best to store MA outside by itself. Example: I store bleach/chlorine in the garage and MA outside under the deck behind a brick pillar setting inside an open 5 gal. bucket. It is exposed to heat/cold, but not direct sun.

    I'm just making sure that you know that these two (MA/chlorine) should not be stored together or near each other.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    Thanks for the advice. I was storing them together in alocked cabinet in the shed - not any more!!!!!
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: big uh-oh - added 1 gal of muriatic acid instead of blea

    brianmac:

    Don't be too hard on yourself. Mistakes are often learning lessons in disguise. Bet you will not make that mistake again. Plus, with the help of others on this forum, the problem was corrected in less than a day.

    Going forward, might want to store MA in a different location than chlorine.
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