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Thread: lowering ph ??

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    lowering ph ??

    has anyone ever heard of using vinegar to lower ph??
    a/g 24'round 4' app 13500 gal sand filter 16''hayward (100lbs sand)1hp single speed pump on timer 12 on 12 off day &night and i use the bbb maintaince

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    Re: lowering ph ??

    Quote Originally Posted by oran
    has anyone ever heard of using vinegar to lower ph??
    Hmmm. Well, not 'til now. Mildly acidic, for sure, and you could simply dip your chips in the pool instead of having a seperate bowl.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    I have heard of using it to kill weeds.
    steve

    Above Ground / 18' Round / Vinyl Liner / Sand Filter / 100K Gas Heater / Salt Added / No Nature2

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    This poolforum thread addresses this. If you can't get to it, this post by waterbear has the essentials:

    "vinegar would cause acetates to form in the water (mostly sodium acetate and calcium acetate I would presume)...not sure what effect they might have but it probably isn't good. Muriatic acid only adds chlorides to the water, which are already there as sodium chorine and calcium chloride. Dry acid adds sulfates, which are suspected of causing problems to the plaster finish by some.

    Also vinegar is a weak acid and just would not be effective."

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    In addition to what was said on the Pool Forum, acetic acid (the acid in vinegar) is an organic chemical. You can consider it to be a chemical relative of ethanol. Since much of what we try to do in a pool is to oxidize organics introduced into the water, why on earth would you intentionally add more and have something else that can consume chlorine? There are a very few organic substances that we add to the pool and pretty much the only one that we intend to keep in the pool is Cyanuric Acid (and its chlorinated derivatives). Sometimes, when we have trouble with soapy films (and are impatient), we buy enzymes, and sometimes when we have metal in the water we buy a chelating sequestrant (an organophosphate), and when we want to reduce an iron stain we use ascorbic acid, but these are exceptions.

    Richard
    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
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    i had been told by a friend that he had used it and it worked very well for him....ive told him of this site so hopefully he checks it out and pool maintence will be much easier with all the fine help here .thanks for the quick reply..
    a/g 24'round 4' app 13500 gal sand filter 16''hayward (100lbs sand)1hp single speed pump on timer 12 on 12 off day &night and i use the bbb maintaince

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    Using vinigar to lower pH is an urban legend that has been around for a while. vinegar is only 5% acetic acid and will not have a major impact on pH unless you use a lot. It is also a weak acid (chemically speaking) even in glacial (concenrated) form. If you also have a SWG and use vinegar you can then dump in a bunch of cucumbers and make pickles!

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    okay i got it ill try not to go there anymore but i do like yall's humor,gotta be able to laugh at yourself now and then...
    a/g 24'round 4' app 13500 gal sand filter 16''hayward (100lbs sand)1hp single speed pump on timer 12 on 12 off day &night and i use the bbb maintaince

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    Muriatic Acid (31.45% Hydrochloric Acid) is about 12 times more powerful an acid by volume than Vinegar (5% Acetic Acid). That is, it takes 12 times the volume of vinegar to be equivalent to a given volume of Muriatic Acid in terms of its affect on pH.

    Interestingly, it doesn't matter very much that Acetic Acid is a "weak" acid because at the pH range of pools ( 7-8 ), the acetic acid is relatively "strong" in that it nearly fully contributes its hydrogen (it's pKa is 4.76). So the calculation to get the above is mostly about the difference in weight concentration (31.45% vs 5%), the difference in density (1.16 vs. 1.0), and the difference in molecular weight (36.46 vs. 60.05).

    Richard
    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
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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