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Thread: Battling Rising PH

  1. Back To Top    #1

    Join Date
    May 2012
    Location
    NE OK
    Posts
    54

    Battling Rising PH

    This is my second year on BBB. I am still learning a lot but am in a much better position than I was last year at this time. I feel like I am adding a lot of muriatic acid. I had trouble with calcium scaling on the walls this year. It has improved a lot but there is still some there. (Because of this I was advised to keep my PH on the lower end (7.2) for a few weeks). My test results the past week or so:

    on 6/18
    FC-5.5
    CC-.5
    TC-6
    TA-70
    CH-170
    PH-7.4
    CYA-30

    on 6/24
    FC-6
    CC-.5
    TC-6.5
    TA-100
    CH-230
    PH-7.8 (after testing this day, added approx. 42 oz. muriatic acid)
    CYA-30 (added stabilizer to raise to 40. My goal is 50 but I am doing it gradually)

    Today 6/27
    FC-8.5
    CC-.5
    TC-9
    TA-90
    CH-180
    PH-7.6
    CYA-40

    I have been running my pump a lot. I guess if I would power it off at least 8-10 hours a day that would help? Because of the remaining calcium I feel like I should drop the PH again. I was dealing with rising PH last year too. I probably averaged adding about a quart weekly. Is that normal? I just don't like handling muriatic acid. How does the PH-minus from Wal-Mart work/compare? Am I missing anything else in the changes of my test results?
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,345

    Re: Battling Rising PH

    Between 6/18 and 6/24 your TA rose from 70 to 100. What caused that?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Join Date
    May 2012
    Location
    NE OK
    Posts
    54

    Re: Battling Rising PH

    Quote Originally Posted by Bama Rambler
    Between 6/18 and 6/24 your TA rose from 70 to 100. What caused that?
    I haven't done anything to adjust my TA. Unless it was a testing error, I don't know why the difference? It's been anywhere from 70-100. Doesn't TA change, as well, when I add muriatic acid? Most of the time it is around 100. Like I said, I haven't added any baking soda. I did float some chlorine tablets for a couple days a week or so ago.
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Battling Rising PH

    Yes, that is a puzzler....TA and CH are up and down. I could see them climbing from hard fill water...

    A quart a week is about the same as I use, adjusted for size differences. The dry acid is a sulfur compound. I'm just wary of it...I don't remember enough college chemistry to know what might trigger that to start smelling sulfurous.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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