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Thread: PH keeps falling

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    mnasholm's Avatar
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    PH keeps falling

    Why does my PH slowly keep drifting down?

    Seems I have to add atleast a cup of borax every 4-6 days to bump it up.
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    Re: PH keeps falling

    Could you post test results?

    What is your TA?
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    mnasholm's Avatar
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    Re: PH keeps falling

    Tc 5
    fc 5
    cc 0
    ph 7.3
    ch 50
    ta 80
    cya 40
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    Re: PH keeps falling

    Quote Originally Posted by AimeeH View Post
    Could you post test results?

    What is your TA?
    ...and your source of chlorine?
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

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    Re: PH keeps falling

    Bleach....of course
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    Re: PH keeps falling

    following this thread as I'm trying to learn as much as I can. Good luck. These guys are awesome and will fix you up!
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    Mod Squad pooldv's Avatar
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    Re: PH keeps falling

    That is a little weird for me. I almost always see rising PH and am much more versed in how to deal with that. But, you do have a few choices that I am aware of, I just don't have any experience with them or know what works better because I also have rising PH.

    Raising your TA slowly with baking soda until PH stabilizes, like 10ppm a week or so.
    Continue raising your PH with Borax until you have enough borates to stabilize your PH.
    Add enough Borax to raise borate to 50ppm right now.

    Here is an article about borates, Borates - Why and How
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    mnasholm's Avatar
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    Re: PH keeps falling

    Thanks pooldv, what should my TA be? I thought 80 was good.

    - - - Updated - - -

    Quote Originally Posted by Pogueld View Post
    following this thread as I'm trying to learn as much as I can. Good luck. These guys are awesome and will fix you up!
    Thanks, I'm trying to learn as much as possible also I have been really enjoying this community

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    Re: PH keeps falling

    What is the pH of your fill water? If it has low or neutral ph, every time you replace water lost to evaporation and splashout, it would lower the pH a tiny amount.

    Does the pH mainly drop after a rain? Up here in the Seattle area, we occasionally get acid rain coming from the industrial areas to the north (Everett, WA to Vancouver, BC). Perhaps you're getting rain filled with acidic stuff drifting south from Albany and Portland?
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    Mod Squad pooldv's Avatar
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    Re: PH keeps falling

    Quote Originally Posted by mnasholm View Post
    Thanks pooldv, what should my TA be? I thought 80 was good.

    - - - Updated - - -


    Thanks, I'm trying to learn as much as possible also I have been really enjoying this community
    TA is not a number that really "should" be something. It is a combo of things (fill water, pool surface, age, PH) and finding the range that ultimately makes your PH stable. TA can be anywhere from like 60 to stop rising PH to around 120 stop falling PH. And PH can be anywhere from 7.2 to 7.8 if it stabilizes there.

    There are people here with and without SWG who have not adjusted their PH in years because their fill water, CH, TA are all in a sweet spot. I'm jealous! Getting my PH stable is going to be my summer project.
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    mnasholm's Avatar
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    Re: PH keeps falling

    Got it back up to 7.5 and TA of 80-90, we'll see how that does
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    mnasholm's Avatar
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    Re: PH keeps falling

    Fell about .1 every day this week. Just added 2 more cups of Borax......super weird
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    Mod Squad pooldv's Avatar
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    Re: PH keeps falling

    It is weird. You might be the only one here right now raising PH. Why be normal, eh!
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    Re: PH keeps falling

    Thats how we work here in Eugene, OR haha.
    Guess I'll just keep adding borax, Heck I'm getting borates out of this haha.

    Question though, this is slowly adding TA too right? If so what do I add instead if the TA gets too high?

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    Mod Squad pooldv's Avatar
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    Re: PH keeps falling

    You are getting borates out of the deal. I am a fan of borates. Borax raises TA least of the chemical options. Raising your TA is not bad. There is a good chance that adding borax to raise pH and TA will eventually get you to a point of homeostasis on your PH. If that happens with TA anywhere from 80ish to 120ish then that is fine. You can also raise PH with aeration with no impact to TA

    See the raising PH section on this page for more info.
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    mnasholm's Avatar
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    Re: PH keeps falling

    Perfect, Thanks pooldv
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