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Thread: Help, shocking and PH is through the roof!

  1. Back To Top    #1

    Join Date
    Jun 2010
    Location
    Columbia County, NY
    Posts
    5

    Help, shocking and PH is through the roof!

    To make a very long story short, pool went from fine with good numbers to a green monster overnight. Been battling green since Monday and not making much progress. Keeping FC around 20-22 with 0% loss overnight.

    Numbers Tuesday evening were:

    FC-22
    CC-0
    PH-7.5
    CYA-50

    Wed early AM:

    FC-22
    CC-0
    PH-7.5

    Added 128 oz 12.5% bleach Wed night after work to hit it even harder and numbers are:

    FC-27
    CC-0
    PH->8.2

    What happend with the PH? I was at 7.2 on Monday and now above 8.2 I would think all the chlorine would bleach out the test and make the PH test read lower?

    Do I leave the PH alone since I'm shocking and it will settle back down or do I need to hit that too? Urgh!

    Thanks for the help!

    Michele
    15 x 30 x 52" Oval Above Ground
    Sand Filter, 1 hp pump
    Awesome 16x20 Deck

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Help, shocking and PH is through the roof!

    Ignore it.

    Bleach is carried in a very alkaline solution. It will equalize sort of when the breakdown of the NaOCl is complete. When you're done shocking, the water's clear, and the FC is down to a more normal level, you can resume worrying about pH. In the meantime, you're just wasting reagent and worrying needlessly.
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  3. Back To Top    #3
    Butterfly's Avatar
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    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Help, shocking and PH is through the roof!

    Don't test the pH while the FC is above 10 as it can read a false high.

    When your FC drops below 10, retest pH, adjust (if necessary) and then resume shocking.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  4. Back To Top    #4

    Join Date
    Jun 2010
    Location
    Columbia County, NY
    Posts
    5

    Re: Help, shocking and PH is through the roof!

    Thanks for the help! I will stop testing PH and just battle the algae.

    I've got my fingers crossed for it changing to milky white today!

    Michele
    15 x 30 x 52" Oval Above Ground
    Sand Filter, 1 hp pump
    Awesome 16x20 Deck

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