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Thread: Adjust pH, TA or borates first?

  1. Back To Top    #1

    Join Date
    May 2012
    St. Louis, MO

    Adjust pH, TA or borates first?

    Water on opening is slightly green, but unusually good for my pool at opening, thanks to BBB last year!

    I am going to shock to clear up the algae, but my numbers are below. I would appreciate help deciding the next step in two areas:

    1. I am not sure what order to address the pH/TA issues that I have. Obviously my pH and TA are low and need to come up and adjusting one will affect the other. Do I add the Pool Calculator's suggested soda ash (pH) or baking soda (TA) first? I love what borates did for my pool last year. Do I need to add Borax and would that affect the pH and TA, meaning that I should do that first?

    2. Do the numbers suggest any other issues?

    pH 6.8 (or lower)
    TA 50
    FC 4
    CC 1
    Borates 30
    CYA 30

    Outdoor 12,700 gallon, 175 sq'cartridge filter, IG vinyl, EcoStar variable speed pump.

  2. Back To Top    #2

    Join Date
    Jun 2012
    Howell, NJ

    Re: Adjust pH, TA or borates first?

    Here is what I would do, but I am no expert so wait for their advice.
    1) Adjust pH to 7.2
    2) Follow shock process
    3) Adjust TA to 70
    4) Add borates
    7 year old ~13,500 gal 24' AGP with 1.5 hp Proline pump, 150 sqft Pleatco cartridge, filled with well water with pH of about 4.5.
    Wanda the Whale pool vacuum, home made heater, Taylor K-2006
    Cloudy Pool? 1) Order test kit. 2) Follow SLAM
    New to TFPC? Read Pool School a few times, then post questions. PoolMath will help with chemical additions.

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Adjust pH, TA or borates first?

    JohnN has the right idea! Here is a little background information to go with his suggestions. Definitely raise PH first. Keep in mind that the common PH test reports any number below 6.8 as 6.8, so your actual PH might be much lower than it appears.

    Don't adjust TA until after you have corrected the PH and then measured TA again. The chances are that TA will be fine once the PH comes up.

    Borates are always last, after everything else is completely under control.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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