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Thread: PH swinging wildly

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    jamesd8's Avatar
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    PH swinging wildly

    Seeking guidance. PH is 8 one day and the next 7

    Seems to stay within 7-8 range but the fluctuation within range varies wildly from one day to the next (especially when I put the cover on).

    I'm hesitant to add chemicals due to daily differences happening on their own.

    Thanks!
    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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    Mod Squad jblizzle's Avatar
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    Re: PH swinging wildly

    That is really not possible without chemical additions.
    Post up a full set of test results.
    How are you chlorinating?
    Jason, TFP Moderator
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    jamesd8's Avatar
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    Re: PH swinging wildly

    I use bleach 8.25%. I keep Cl level between 2-5PPM. I add about 2 or 3 cups every night. With high Sun directly on pool all day Cl seems to burn off about 2-3PPM throughout the day. Last I tested CYA was at 30 three weeks ago. I will do the full suite if tests with my Taylor kit.


    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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    jamesd8's Avatar
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    Re: PH swinging wildly

    CL 4.6
    PH 7.8
    TA 140
    CH 200
    CYA 40


    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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    Mod Squad JVTrain's Avatar
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    Re: PH swinging wildly

    Is it high after days where there was alot of use or aeration? And did it miraculously go down again after? I can't see any way for the pH to go down without adding SOMETHING to the pool. Acid rain? LOL.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Mod Squad jblizzle's Avatar
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    Re: PH swinging wildly

    And the TA is high enough that wild swings should not be possible.

    I am suspecting testing error? Something contaminating the sample or the vial?
    Jason, TFP Moderator
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    jamesd8's Avatar
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    Re: PH swinging wildly

    Well, a few weeks back I added muriatic acid to lower PH. Having done any since, and it does swing around based on test results. If it's impossible for this to happen then I will look at other factors.


    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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    jamesd8's Avatar
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    Re: PH swinging wildly

    Haven't done any since. Acid rain. Funny.


    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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