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Thread: TA too high

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    TA too high

    My TA is too High at 190-200, I used pool calc to lower PH from 7.8 down towards 7.1. I have added the correct amount of MA per calc. PH doesnt seem to move much. Should I keep going? My PH seems stable. I thought TA acted like a buffer for PH swings? My TA is suppoed to be at 60-80.
    Intex Ultra Frame 18 x 9 x 52 rectangle. 4545 Gallons.
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    linen's Avatar
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    Re: TA too high

    How much MA did you add?

    Are you sure your ph was at 7.8 and not higher?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: TA too high

    well i cant remember the exact amount the calc said approx 16 oz. or so i think? My numbers are at home. I'm pretty sure my PH was 7.8 according to the taylor basic OTO test.
    Intex Ultra Frame 18 x 9 x 52 rectangle. 4545 Gallons.
    12 in Krystal Clear™ Sand Filter Pump w/ GFCI.
    Krystal Clear Saltwater System™ w/ GFCI.
    TF-100 Taylor testing.
    K-1000 Taylor testing.

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    linen's Avatar
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    Re: TA too high

    I get 27 ounces of 30.45% of MA to move your 4545 gallon pool (with a starting TA of 200 ppm) from 7.8 to 7.1 ph.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: TA too high

    Hmmp, May be I have something setup wrong in my calc? I will verify the numbers I input when I get home for lunch. BTW I had to buy 14.5% yesterday to complete this task. no 29% available. Whic means now I have to double it.
    Intex Ultra Frame 18 x 9 x 52 rectangle. 4545 Gallons.
    12 in Krystal Clear™ Sand Filter Pump w/ GFCI.
    Krystal Clear Saltwater System™ w/ GFCI.
    TF-100 Taylor testing.
    K-1000 Taylor testing.

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    linen's Avatar
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    Re: TA too high

    Quote Originally Posted by Ame
    BTW I had to buy 14.5% yesterday to complete this task. no 29% available. Whic means now I have to double it.
    Yep, then you would have needed 60 ounces...you can select 14.5% on the poolcalculator.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Smykowski's Avatar
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    Re: TA too high

    How fast is your pH moving?

    Yes, it is a buffer, but each pool seems to have it's own TA need, so while 70 is optimum for one pool, 100 might be optimal for another (like mine
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: TA too high

    this afternoon I put in 4 cups of MA. PH went from 7.5 to 7.1. and TA from 200 to 150. does that seem right. I have to leave it at that till im back in town
    Intex Ultra Frame 18 x 9 x 52 rectangle. 4545 Gallons.
    12 in Krystal Clear™ Sand Filter Pump w/ GFCI.
    Krystal Clear Saltwater System™ w/ GFCI.
    TF-100 Taylor testing.
    K-1000 Taylor testing.

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    Smykowski's Avatar
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    Re: TA too high

    That's close, though I would have expected a bigger pH movement and a smaller TA movement.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Mod Squad jblizzle's Avatar
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    Re: TA too high

    Seems reasonable to need that much of the 14% MA to lower the pH from 7.5 to 7.1 with a TA of 200. According to the calculator, it should have required 40 oz of the 15% MA.

    I too am a little surprised the TA moved that much.
    Jason, TFP Moderator
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    Charlie_R's Avatar
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    Re: TA too high

    Could it be the static testing error?

    Playing with the pool calculator, I come up with a starting TA of 150ish for that much movement, dropping to about 110.

    Or maybe I'm doing something wrong with the calculator.....
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: TA too high

    Smykowski, above you posted; (each pool seems to have it's own TA need, so while 70 is optimum for one pool, 100 might be optimal for another).
    How can I know where a pools optimum TA level is?
    Thanks : )
    36k, FNS plus 60 DE filter, in ground cement, 40-60GPM

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    Re: TA too high

    Just keep lowering your pH when it gets high, and the pool will eventually settle at its happy spot for TA.
    John
    7 year old ~13,500 gal 24' AGP with 1.5 hp Proline pump, 150 sqft Pleatco cartridge, filled with well water with pH of about 4.5.
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    Smykowski's Avatar
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    Re: TA too high

    Quote Originally Posted by JohnN
    Just keep lowering your pH when it gets high, and the pool will eventually settle at its happy spot for TA.
    This.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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