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Thread: Is my TA and CH ok?

  1. Back To Top    #1

    Join Date
    Jul 2012
    Lotus, California

    Is my TA and CH ok?

    Hi all,

    Been using BBB since the begining of summer and all is well. Crystal clear and sparkly water! My CYA is still a bit high (60) due to prior use of pucks and I will address that this winter with rain dilution and then adjust to ~ 40 next spring.

    My questions...

    1) is my TA too high, and if so, what may have caused that and what are the potential consequences? Should I address now, in the spring, or don't worry about it.

    2) is my CH too low, and if so, what may have caused that and what are the potential consequences? Should I address now, in the spring, or don't worry about it.

    Test results from the TF100 kit.

    pH = 7.5
    FC = 6
    CC = 0
    CYA = 60
    TA = 230
    CH = 150

    My fill water is well water with a pH of 7.8 and CH of 110. I usa a clear solar cover and the pool stays between about 84 and 92F during the summer. Perhaps the TA and CH are out of whack due to **** the pool store had me adding when I bought the house in the spring?

    Thanks for your comments and advice!

    ~ 8,400 gallon, cartridge, IG, fiberglass, 1hp & 120 gpm filter design, ~ 2002

  2. Back To Top    #2
    msgtdan's Avatar
    Join Date
    Jul 2011
    SW MO

    Re: Is my TA and CH ok?

    I don't know much about fiberglass pools, in my vinyl pool I don't worry about either to much. My fill water is high on both, and both come down with rain water dilution. TA also comes down as I adjust for rising PH with acid. What is your fill water TA?
    Dan D
    Used 2003 Aqua Leader 27'x52", 17,800 w/10" hopper, SwimPro SW256T 250# sand filter, Hayward PowerFlo LX pump 1hp impellor, Emerson 1 1/2 hp motor, setup Aug 2012 Summer 2011 used Summer Escapes Ring pool 14' x 42", Intex 1600gph sand filter, HTH 6 way test kitTF-100 w/stirrer, Well water @ FC=0, PH=7.2, TA=290, CH=320

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Is my TA and CH ok?


    Looks like your CH is low and your TA is certainly high.

    The TA will not hurt anything, but will make your pH rise more quickly ... keeping the pH in line will work to lower the TA ... or you can actively try to lower it using the process described in Pool School.

    I am not sure what the lower CH will do the the fiberglass, but the recommended levels are what they are for some reason
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  4. Back To Top    #4

    Re: Is my TA and CH ok?

    I've adjusted TA fast and I've done it slow and I think it is the same amount of work, only the time frame differs. My advice is to mind your pH and let the TA take care of itself. Use Muriatic Acid to lower the pH, TA will very slowly fall.

    If your tap water TA is high, then every time you add water to the pool that TA will rise a tiny bit, every time you add MA it will fall a tiny bit. Any rain ought to add water with no TA. Over time you expect the TA to fall, just beware to not add things that increase it. That is, always check the Pool Calculator, Effect of Adding Chemicals, or ask here before you add products to the pool.

    Do check your TA maybe once a week, as when it declines by say 10%, then you need 10% less MA to create the same change in pH that you targeted.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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