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Thread: How will I know that I have the Ideal TA?

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    How will I know that I have the Ideal TA?

    This is titled the Deep End... So here it is if you are up for it.

    I've been reading the threads about TA and have some understanding most of it at this point. My question is... Practically speaking, is there an ideal TA for my pool? and if so, how will I know that I have reached it?

    I ask because I see that I should be in a range of 60-90+ according to stuff I have read here and elsewhere. Currently, my TA is about 95 or so. That's essentially in the range. I have MA sitting in my shed and I have a great little aerator, so lowering ( or even raising) my TA more is no big deal and will only cost me a couple dollars of MA and some time. Should I get it to 80? or 70? or 60? Will it have any practical value to my pool care? How would I know that I have hit my ideal TA? Or doesn't it really matter at all?
    25000 gal inground freeform plaster pool with spillover hot tub. 1.5 hp PacFab Challenger pump, Hayward DE filter, Natural Gas heater, BBB convert 2009, Aquasol solar panels on ground rack 2010, PS-4 controller 2010, Rocky roller, SWG 2011.

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    Re: How will I know that I have the Ideal TA?

    How fast does your pH rise? If you have to put acid in a lot to lower the pH then your TA is too high. If your pH is stable your TA is fine. Most pools do best with the TA in the range we recommend but there are always going to be exceptions.
    If you have new plaster or a lot of aerating water features then your pH is going to rise no matter what.

    You will know when you hit the ideal TA because the Heavens will part and a chorus of Angels will sing!

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    Pisces's Avatar
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    Re: How will I know that I have the Ideal TA?

    Quote Originally Posted by waterbear
    You will know when you hit the ideal TA because the Heavens will part and a chorus of Angels will sing!
    *SNORT*!! Oh, BLESS ME, that was funny, waterbear!! OK...I'll also be watching for the miraculous event too, but in the meantime I'll keep testing. BTW...is that piece of info in Pool School?
    7,000 gal. IG gunite, SWG, PebbleSheen interior finish-Aqua Blue, 8' vanishing edge raised 16-jet overspill spa, 2 12" waterfalls, tan shelf with bubbler.
    Pentair equipment: Easy Touch 8, Intellichlor IC-40, Intelliflo VF 3050, 2.5 hp Whisperflo spa pump, 1 hp Whisperflo water feature pump, Quad 100 DE filter, Master Temp 400 heater, Legend Platinum Cleaner (3/4 hp pump). Autofill, TF-100 Test Kit w/salt and borate strips.

    Pisces Pool Build

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    Re: How will I know that I have the Ideal TA?

    Thanks. So the ideal TA is really "measured" by how stable my pH is - right? If the pH doesn't fluctuate much - the TA is fine. If it rises? I should lower it more?? If it lowers? I should raise it more??

    My plaster is almost 20 yrs old. The aerating feature really has only been used over the past week to lower help my TA from ~ 150 to the current level. I can't tell you how stable the pH is yet - only that it has been stable at 7.6 for the past 24 hours.
    25000 gal inground freeform plaster pool with spillover hot tub. 1.5 hp PacFab Challenger pump, Hayward DE filter, Natural Gas heater, BBB convert 2009, Aquasol solar panels on ground rack 2010, PS-4 controller 2010, Rocky roller, SWG 2011.

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    dmanb2b's Avatar
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    Re: How will I know that I have the Ideal TA?

    give it some time, if it stays stable for at least a week your near your sweet spot
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: How will I know that I have the Ideal TA?

    I think that the TA of your tap water will come into play here, since if you are refilling much due to splashout or evaporation or backwashing your pool TA will be changed with the additional water.

    My tap tested at TA 340! So, for me, that adds up with the 1"-2" evaporation per week.
    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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    Re: How will I know that I have the Ideal TA?

    Quote Originally Posted by mokabb
    Thanks. So the ideal TA is really "measured" by how stable my pH is - right? If the pH doesn't fluctuate much - the TA is fine. If it rises? I should lower it more?? If it lowers? I should raise it more??
    You got it!
    Quote Originally Posted by dmanb2b
    give it some time, if it stays stable for at least a week your near your sweet spot
    Exactly! Do I see an Angel over there?====================>
    Quote Originally Posted by anonapersona
    I think that the TA of your tap water will come into play here, since if you are refilling much due to splashout or evaporation or backwashing your pool TA will be changed with the additional water.

    My tap tested at TA 340! So, for me, that adds up with the 1"-2" evaporation per week.
    Good Point! If your fill water has high TA then I would keep the TA at the low end of the scale and add some acid to drop the pH down to around 7.0-7.2 whenever you have to add fill water. It will still be less acid than if you don't try and keep your TA down.

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    Re: How will I know that I have the Ideal TA?

    Great topic, i was wondering the same thing. So would you say that if you have to add acid once a week that you would be at a good ta level? every 2 weeks?
    Kidney shaped ~ 10000 gallon Ig Plaster pool with pool cage. 120sf Cartridge filter. Pentair WhisperFlo WFDS-26, 230 Volt, 7.8/3.0 Amp, 1-1/2 Horsepower 2 speed pump, Solar panels on the roof. Heliotrope HelioMatic 4000D solar controller.

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    JasonLion's Avatar
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    Re: How will I know that I have the Ideal TA?

    If you can hold PH adjustments to once a week you are doing fine. It is possible to tune things so you adjust the PH less often than that, but the effort of figuring that out can be larger than simply adjusting the PH once a week.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: How will I know that I have the Ideal TA?

    I am thinking my TA is like 120, lowered it from about 240 over last year, but, my Ph is stable, so I am no longer going to mess with it. I had to add some borax one week, and a bit of acid another, a couple weeks apart, but that is good enough for me.
    steve

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

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