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Thread: High ph

  1. Back To Top    #1

    Join Date
    Aug 2016
    Location
    Burleson, TX
    Posts
    6

    High ph

    I can't seem to keep my ph down. I use muratic acid to get it down to 7.5 and a week later it is well above 8 again. Please advise.
    10,500 gallon in ground plaster with attached spa

  2. Back To Top    #2

    Join Date
    Sep 2013
    Location
    Connecticut
    Posts
    728

    Re: High ph

    Do you have fairly new plaster? Any water features that aerate the water?

    Can you post a complete set of test results, please?
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

  3. Back To Top    #3

    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: High ph

    A full set of test results would help.

    High TA will drive PH up - as will aeration of the water. Does your spa have an attached waterfall?

    Typically the plan is to lower your TA to 60 or so and see if the PH stabilizes.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  4. Back To Top    #4

    Join Date
    Aug 2016
    Location
    Burleson, TX
    Posts
    6

    Re: High ph

    FC 3
    CC 0
    TA 125
    CH 220
    PH over 8
    CYA 35

    the waterfalls are turned off due to the fact that I have heard that it increases ph.
    10,500 gallon in ground plaster with attached spa

  5. Back To Top    #5

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: High ph

    You would probably be well served to lower your TA.
    Pool School - Lower Total Alkalinity
    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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