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Thread: is it normal for PH to raise on its own?

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    is it normal for PH to raise on its own?

    It's been too cold to swim here so I haven't been doing my routine chemistry check. Did it last weekend, brought everything to speed, now I notice my PH went from 7.2 to 8.2.
    SF Bay

    ********20,000 gallon IG Fiberglass, DE Filter, Hayward Max-Flo VS, Taylor TF-100 Test, Circupool RJ-45********

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    RonsPlc's Avatar
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    Re: is it normal for PH to raise on its own?

    What is your TA, and how much rain did you get?
    Could you post a whole set of numbers?
    14600 gal Intex 24' Round 52" deep AG Pool (Heavily Modified)
    200lb sand filter w/2 speed 1.5/0.5hp pump
    Stenner 45MHP10 Liquid Chlorine (well... bleach) Injector. Borates added.
    K-2006 test kit w/Speedstir
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    Re: is it normal for PH to raise on its own?

    I added acid and chlorine just moments ago and did not log a full set this morning. I normally do a full set every couple weeks but I remember my TA was 100 last I checked.

    I normally test for PH and FC every few days. Should I be doing the full test each time?

    I can couple back in a few hours to do a full set
    SF Bay

    ********20,000 gallon IG Fiberglass, DE Filter, Hayward Max-Flo VS, Taylor TF-100 Test, Circupool RJ-45********

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    Re: is it normal for PH to raise on its own?

    I don't do a full test ea time. Sometimes I just put in my standard dose of chlorine without doing a FC test. The next day I will do a FC test though. Heck, sometimes I will do a FC test and after I see the shade of red, I will stop there without putting in and counting the drops. I feel I have a good grip on what my pool needs and how to take care of it.

    As far as the ph goes, yea I have to adjust it a few times during the season. But not often.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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    AimeeH's Avatar
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    Re: is it normal for PH to raise on its own?

    Quote Originally Posted by dannieboiz View Post
    It's been too cold to swim here so I haven't been doing my routine chemistry check. Did it last weekend, brought everything to speed, now I notice my PH went from 7.2 to 8.2.
    Your TA is a buffer for your PH. High TA can cause ph to rise re quickly. That's the reason for the TA question.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    RonsPlc's Avatar
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    Re: is it normal for PH to raise on its own?

    I normally check my FC CC and PH regularly (daily), if I see anything out of line from what I expect, I do some further testing.
    I have found that keeping my TA at between 80-90 works best for keeping my Ph where I want it. ( a trick with my tap water being 150+ TA)
    Rain will increase your Ph in a hurry, which is why I asked.
    14600 gal Intex 24' Round 52" deep AG Pool (Heavily Modified)
    200lb sand filter w/2 speed 1.5/0.5hp pump
    Stenner 45MHP10 Liquid Chlorine (well... bleach) Injector. Borates added.
    K-2006 test kit w/Speedstir
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    Re: is it normal for PH to raise on its own?

    Had a little algae so I added a bunch of chlorine....
    Result test from yesterday...

    FC-11 - dropped to 9 today
    PH- 8.2 - 7.2 today after adding acid yesterday
    CH-350-400
    TA- 100
    CYA-50
    SF Bay

    ********20,000 gallon IG Fiberglass, DE Filter, Hayward Max-Flo VS, Taylor TF-100 Test, Circupool RJ-45********

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