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Thread: TA and Continued Ph Rise

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    Join Date
    May 2016
    Location
    Phoenix, AZ
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    11

    TA and Continued Ph Rise

    I recently switched over to a SWG and am loving the results and ease of maintenance. But I am noticing a steady rise in pH. I've also been battling to get my TA down through acid addition and aeration, but its slow going. It is at 90 now, down from 130 six weeks ago. Some weeks, my TA actually rises a bit, despite contantly dropping my pH to 7.2. I thought my fill water might be the issue, so I tested it last night. Sure enough it reads 8.0 pH and 130 TA. I'm adding about three quarts of 31.45% Muriatic Acid on a weekly basis. I should also mention that I foolishly added borates to the pool (about 40 ppm) before getting TA down, so that's not helping any.

    My question is: Should I be doing anything differently? Am I resigned to a perpetual pH battle given the makeup of my fill water? About once or twice a week I measure pH and drop to 7.2 and like I said I go through roughly 3 quarts a week. I use the pool's aerator every night for the full 8 hours the motors runs. (Phoenix hits 110 almost everyday and I prefer my pool water at about 85.) Other than that my pool is very little maintenance. Thanks for your help and here are my test results from last night:

    FC: 6.0
    CC: 0.0
    pH: 8.0/7.8? Hard to tell
    TA: 90
    CH: 770
    CYA: 90
    Borates: 40
    Salt: 3300
    CSI: .51
    20500 gal Pebble Tec ingroud. Hayward S310T Sand Filter, 3/4 HP Hayward pump, Hayward Poolvergnuegen, Hayward AQR15 SWG.

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    cj3737's Avatar
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    Jun 2016
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    North Ogden, UT
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    Re: TA and Continued Ph Rise

    What is the second CC you listed?

    Im having the TA battle as well.. pain in the butt, aint it... especially when your fill water is well above what your target is..huh?

    What kind of test kit are you using?

    The 8 hour aeration may be whats pushing up your ph.. maybe reduce that a bit.. your temp may rise a tad but your ph should level out too.

    TA isn't off the charts, even with your fill water
    Inherited 24' Muskin Above ground
    13500 gal
    Hayward S180T92S Sand filter
    Taylor K-2006C Speedstir
    TFPC for Beginners | Pool Math | Pool School | CYA Chart | SLAM | Test Kits | ABC's

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    Mr Bruce's Avatar
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    Mar 2014
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    Re: TA and Continued Ph Rise

    The SWG causes constant pH rise as well.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    May 2016
    Location
    Phoenix, AZ
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    11

    Re: TA and Continued Ph Rise

    Oops, I edited the post. That CC should have been CH. A pool with 770 CC doesn't sound inviting. I agree that the TA battle is a pain! It's not the end of the world, but anything I can do to eliminate maintenance and cost is great. Plus I don't like anyone but me handling the 31.45% MA. From my perspective it's the only part of maintaining my pool that presents a risk of injury or damage to the pool. So reducing the need for MA would be nice for those times that I am away.
    20500 gal Pebble Tec ingroud. Hayward S310T Sand Filter, 3/4 HP Hayward pump, Hayward Poolvergnuegen, Hayward AQR15 SWG.

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    cj3737's Avatar
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    Jun 2016
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    North Ogden, UT
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    Re: TA and Continued Ph Rise

    Absolutely agree....

    My fill water is around 180 and im sitting at 150 at the moment but Im not getting any PH spikes so Ive kinda put that on the back burner. Honestly I haven't seen it above 7.5 even sitting for 3 days untouched...
    Inherited 24' Muskin Above ground
    13500 gal
    Hayward S180T92S Sand filter
    Taylor K-2006C Speedstir
    TFPC for Beginners | Pool Math | Pool School | CYA Chart | SLAM | Test Kits | ABC's

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