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Thread: Lower TA?

  1. Back To Top    #1

    Join Date
    Apr 2011
    Location
    Springfield, MO
    Posts
    44

    Lower TA?

    Plaster pool with SWG. Pool is 2 yrs old.

    Last year, pH was a little volatile. Always creeping up. pH seems more stable this year.

    Need to raise CH. Currently 150. I know I need to get this up to around 300.

    Had flow problems with SWG last year due to calcium build up. Had to acid wash SWG at the beginning of pool season this year.

    TA has always been high (120-140). Currently 140.

    My question - do I need to lower TA to 60-80 range?

    In pool school:
    Water balance for SWG page suggests it's important to have TA in range of 60-80.

    However, on "Lower TA page", says that TA shouldn't be lowered for a target number. As above, pH has been relatively stable this year. Via poolcalculator.com, CSI is -0.01 which is within range. However, did have calcium build up in SWG.

    So, lower TA or no?

    One other question:
    Added powder CYA to skimmer sock 2 days ago. Dissolved now. Read on pool school not to measure CYA for 1 week. If I measure CYA now, is the measurement accurate being CYA dissolved from skimmer? Or do I really need to wait 1 week?

    Thanks in advance for the help.
    Chad

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Lower TA?

    Quote Originally Posted by cpotter638
    Plaster pool with SWG. Pool is 2 yrs old.

    Last year, pH was a little volatile. Always creeping up. pH seems more stable this year.

    Need to raise CH. Currently 150. I know I need to get this up to around 300.

    Had flow problems with SWG last year due to calcium build up. Had to acid wash SWG at the beginning of pool season this year.

    TA has always been high (120-140). Currently 140.

    My question - do I need to lower TA to 60-80 range?

    In pool school:
    Water balance for SWG page suggests it's important to have TA in range of 60-80.

    However, on "Lower TA page", says that TA shouldn't be lowered for a target number. As above, pH has been relatively stable this year. Via poolcalculator.com, CSI is -0.01 which is within range. However, did have calcium build up in SWG. Both are true. Many people attack TA for no reason except that it shows out of the ideal range. In your case, you have a valid reason - the pH climbs too fast.

    So, lower TA or no? I'd say yes.

    One other question:
    Added powder CYA to skimmer sock 2 days ago. Dissolved now. Read on pool school not to measure CYA for 1 week. If I measure CYA now, is the measurement accurate being CYA dissolved from skimmer? Or do I really need to wait 1 week? Assume it's there, and adjust FC to the target CYA level. But don't waste reagent testing for it yet.

    Thanks in advance for the help.
    Chad
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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  3. Back To Top    #3

    Join Date
    Apr 2011
    Location
    Springfield, MO
    Posts
    44

    Re: Lower TA?

    Thanks for the help.

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