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Thread: TA Won't Budge

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    snichols1219's Avatar
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    TA Won't Budge

    I have been trying to get my TA down to no avail. I adjust my pH to 7.2, which brings the TA down from 130 to 120 and can aerate all day long. Checked it today, pH up to somewhere between 7.5-7.8 (closer to the higher) and TA is back to 130. So I have adjusted it again, and have the bubblers and waterfall/slide running. I have tried this many times over the spring and it doesn't ever seem to get me anywhere. What else can I do to bring the TA down so my pH will quit rising so rapidly?

    Thanks!
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Re: TA Won't Budge

    TA does not increase unless you add something to increase it. Are you adding anything at all to your pool besides acid?
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
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    Texas Splash's Avatar
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    Re: TA Won't Budge

    Curious Shannon, have you tested your fill water recently? Some people have a crazy-high TA in their fill water and have to do the acid/aeration drill for weeks.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    snichols1219's Avatar
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    Re: TA Won't Budge

    Quote Originally Posted by Donldson View Post
    TA does not increase unless you add something to increase it. Are you adding anything at all to your pool besides acid?
    Only acid, salt, stabilizer as needed. The pH in the pool has always climbed rapidly ~ ever since we built it. Checked it yesterday and pH was 7.2, TA 120, today pH 75.-7.8 range, TA 130. I did add 2 gallons of stabilizer yesterday.

    - - - Updated - - -

    Quote Originally Posted by snichols1219 View Post
    Only acid, salt, stabilizer as needed. The pH in the pool has always climbed rapidly ~ ever since we built it. Checked it yesterday and pH was 7.2, TA 120, today pH 75.-7.8 range, TA 130. I did add 2 gallons of stabilizer yesterday.
    And before I lowered to pH to 7.2, the TA was 130.

    - - - Updated - - -

    Quote Originally Posted by Texas Splash View Post
    Curious Shannon, have you tested your fill water recently? Some people have a crazy-high TA in their fill water and have to do the acid/aeration drill for weeks.
    I haven't. I have checked it for calcium before, but not TA. I will walk out and do that now.
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Texas Splash's Avatar
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    Re: TA Won't Budge

    Oh, and you mentioned above "ever since we built it". How old is your plaster?
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    snichols1219's Avatar
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    Re: TA Won't Budge

    Quote Originally Posted by Texas Splash View Post
    Curious Shannon, have you tested your fill water recently? Some people have a crazy-high TA in their fill water and have to do the acid/aeration drill for weeks.
    TA straight out of the fill line is 140

    - - - Updated - - -

    Quote Originally Posted by Texas Splash View Post
    Oh, and you mentioned above "ever since we built it". How old is your plaster?
    Built this time in 2011
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Texas Splash's Avatar
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    Re: TA Won't Budge

    Well, the plaster is certainly cured. 140 is not astronomical, but depending upon how much you have to replenish it could have an effect. As you go through that acid/aerate drill, perhaps take the pH slightly lower to 7.0 to see if it gives any advantage to lowering the TA a little more?
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: TA Won't Budge

    Quote Originally Posted by Texas Splash View Post
    Well, the plaster is certainly cured. 140 is not astronomical, but depending upon how much you have to replenish it could have an effect. As you go through that acid/aerate drill, perhaps take the pH slightly lower to 7.0 to see if it gives any advantage to lowering the TA a little more?
    Yeah, definitely cured. My kids like to remove a lot of water from the pool with all of their cannon balling from the top of the waterfall, so I do replenish quite often. Should I be doing this daily, as in all day? I literally ran the bubblers and slide/waterfall from 9-6:30 yesterday and had them back on my 9 this morning.
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Texas Splash's Avatar
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    Re: TA Won't Budge

    The amount of aeration will really depend on the pool and how much aeration is available. Sounds like you're doing all you can to simultaneously maximize safety during strategic cannonball drops and lowering TA. The more the kids splash and bomb the water the more pH increases as well. Should be easier once school's out.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: TA Won't Budge

    Quote Originally Posted by Texas Splash View Post
    Well, the plaster is certainly cured. 140 is not astronomical, but depending upon how much you have to replenish it could have an effect. As you go through that acid/aerate drill, perhaps take the pH slightly lower to 7.0 to see if it gives any advantage to lowering the TA a little more?
    So I adjusted the pH down to 7.0 yesterday and let the bubblers, etc. run for the day. Just went out to check it and the pH was up to 7.5, but my TA down to 110! Yipee! So, I have adjusted pH back to 7.0 today, turned on the water features, and we will see what tomorrow holds!
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Texas Splash's Avatar
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    Re: TA Won't Budge

    Outstanding!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    snichols1219's Avatar
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    Re: TA Won't Budge

    No pH adjustments today because the kids were in the pool first thing this morning, but I did go ahead and leave the water features running all day. Just ran out to test it and the pH is somewhere between 7.5-7.8 (closer to 7.5 this time) and my TA is down to somewhere between 90-100! When I put in drop 9 it was very faint pinky purple red, with drop 10 it was bright red.I don't recall that my TA has ever been this low! It's about to start pouring rain (again), so I will adjust pH again in the morning. So once I get it a little lower, will it stay this way? OR do you have to do this periodically to keep it in check?
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Texas Splash's Avatar
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    Re: TA Won't Budge

    Nice to hear you're seeing improvements. Each pool is different, but yes .... eventually you'll find that "sweet spot" where the TA and pH remain very constant with only minor adjustments over time. My pool likes a TA for 50-60, and pH changes very slowly.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: TA Won't Budge

    Also depends on what the TA is in your fill water and how much evaporation there is.
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    Re: TA Won't Budge

    If you look a my signature, you'll see I have the same problem (with additional high CH in my fill water). When lowering TA I find it works best to drop the pH to 7.0, then aerate for about two or three hours. Check the pH and drop back to 7.0, repeat. The lowering happens mostly when you are aerating water that's 7.2 pH or lower. Once the pH rises higher than that the process seems to slow down considerably.
    chiefwej
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    Re: TA Won't Budge

    Quote Originally Posted by chiefwej View Post
    If you look a my signature, you'll see I have the same problem (with additional high CH in my fill water). When lowering TA I find it works best to drop the pH to 7.0, then aerate for about two or three hours. Check the pH and drop back to 7.0, repeat. The lowering happens mostly when you are aerating water that's 7.2 pH or lower. Once the pH rises higher than that the process seems to slow down considerably.
    Yep! That's exactly what has happened. It hardly changed when I was only adjusting pH to 7.2 ~ but since I have adjusted and aerated with the pH at 7.0 I have had a significant change! Just went out and checked it and my TA is down to 90! pH is up to 8.2, but I haven't been able to make any adjustments there since Friday. Fixing that now.
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Re: TA Won't Budge

    8.2 Yikes! Get it back down into the 7's and see what the TA is.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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    snichols1219's Avatar
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    Re: TA Won't Budge

    Quote Originally Posted by chiefwej View Post
    8.2 Yikes! Get it back down into the 7's and see what the TA is.
    I know! This is what happens and always has ~ my pH climbs rapidly. I adjusted it to 7 on Friday, didn't get it adjusted on Saturday because the kids were in the pool first thing, but it was between 7.5-7.8 (closer to 7.5). Life happened and nothing got done yesterday other than monsoons, and today it's 8.2, but TA was 90. I have adjusted it down to 7 today.
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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    Re: TA Won't Budge

    Hi Shannon. I'm "right next door" to you in Katy. It sounds like our fill water comes from the same source. After my pool was built in 2014, I struggled to drop my TA for several months, but I finally got there. Nowadays, depending on amount of rain (or lack thereof), my TA bounces around in the range of 70 to 90 regardless of what I do. Keep it up; you'll get there eventually.
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    Re: TA Won't Budge

    Okay, I have gotten the TA down to 70. pH is currently 7.5. Am I done? Do I just leave it as is now and see how my pH reacts and if it's rate of change has slowed with the TA lowering?
    Shannon
    ~ 22,000 gallons, gunite, white plaster, 22'x38' freeform (103' pb) 3'6" shallow 7'0" deep
    Aquarite Generator, Hayward cartridge filters, Hayward Northstar 1.5 hp main pump,
    Waterfall/slide/bubblers with dedicated pump, Polaris 280 vacuum, Hayward 400K BTU heater

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