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Thread: Muratic acid and TA

  1. Back To Top    #1

    Join Date
    Aug 2007
    Location
    Chesapeake, VA
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    41

    Muratic acid and TA

    I have been adding muratic acid to a pH of 7.0 the aerating back to pH of 7.6.

    The TA does not seem to be coming down. It is fluctuating between 250-300.

    pH 7.6
    TA 250
    CH 50
    CYA 50
    FC 6 (high but keeps the algae at bey)
    27k IGV, AquaLogic SWG, Sand filter, Polaris 280
    Filtering 24/7

    I am using a Wally World/AquaChem 5 way kit. So far, I have gone through 2 gal of acid and am wanting to know if I am on the right track.

    Thanks
    Steve
    Steve
    27,000 gal Vinyl Grecian L, Hayward 1 HP pump, Hayward sand filter, Aqua Rite Chlorinator,
    Polaris P955, TF-100, Speed Stir, 400sqft solar panels.
    Jacuzzi J365

  2. Back To Top    #2

    Join Date
    May 2007
    Location
    Houston, Texas, USA
    Posts
    148

    Re: Muratic acid and TA

    Quote Originally Posted by steve_h
    I have been adding muratic acid to a pH of 7.0 the aerating back to pH of 7.6.

    The TA does not seem to be coming down. It is fluctuating between 250-300.

    pH 7.6
    TA 250
    CH 50
    CYA 50
    FC 6 (high but keeps the algae at bey)
    27k IGV, AquaLogic SWG, Sand filter, Polaris 280
    Filtering 24/7

    I am using a Wally World/AquaChem 5 way kit. So far, I have gone through 2 gal of acid and am wanting to know if I am on the right track.

    Thanks
    Steve
    With initial parameters of pH 7.6, TA 300, it's going to take 256 oz (2 gallons) of muriatic to drop the pH to 7.0, and the TA to 260. So as you can see, it takes a lot of acid at that high TA. As the TA comes down (and it will), it will take less and less acid to drop the pH by the same amount.

    Keep doing what your are doing. I'm not sure why you are getting variation in the TA test. Outdated reagents?
    Poor Man's Pool
    Doughboy 18 ft round above ground
    7600 gal with center drain
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    50 ppm borates
    "I know just enough to be dangerous"
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  3. Back To Top    #3
    Mod Squad JohnT's Avatar
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    Apr 2007
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    SW Indiana
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    8,617
    Steve,

    Make sure you note the pH when you check the TA. The TA changes with pH, so you can only make comparisons when the TA measurements are made at the same pH.

    The aeration method works well. My trucked in fill water was 280ppm TA, and my well water is almost 500ppm. I have my pool around 120ppm now.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  4. Back To Top    #4

    Join Date
    Aug 2007
    Location
    Chesapeake, VA
    Posts
    41
    Thanks for the replies.

    Looks like I'll be buying more acid.

    The reagents are good to 2009.

    Thanks again
    Steve
    27,000 gal Vinyl Grecian L, Hayward 1 HP pump, Hayward sand filter, Aqua Rite Chlorinator,
    Polaris P955, TF-100, Speed Stir, 400sqft solar panels.
    Jacuzzi J365

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