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Thread: New Pool Owner, Cannot raise pH

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Wilmington, NC
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    6

    New Pool Owner, Cannot raise pH

    First off I'd like to say this forum is great. I've learned a lot in the pool school section, and am trying to apply it.

    I am new to my 36,000 usg in-ground vinyl pool. It was in very rough shape when I moved in, so I had a pool company clean it up to a level I could maintain it at. It is now very clear, and I bought a K-2006 test kit and my test numbers are not ideal so I've been trying to fix them, starting with pH to no avail. I can't get it to raise AT ALL. Any suggestions?

    6/18
    FC - 2ppm
    CC - 3ppm
    pH - 7.0 (or less)
    TA - 60ppm
    CH - 100ppm
    CYA - 70ppm (I'm ok with this being high given the almost all-day sun the pool gets)

    Ok so pH was low, I added 7 lbs Arm and Hammer Baking Soda. FC was also very low, added 3 usg of 12.5% bleach (13151 on bottle).
    Let filter run overnight, and currently its running 24/7.

    6/19
    FC - 1ppm
    CC - 3ppm
    pH - 7.0 (or less) STILL!?
    TA - 90ppm
    CYA - 70ppm (I'm ok with this being high given the almost all-day sun the pool gets)

    6/20
    pH is still low, went and bought 15lbs baking soda (From Dollar Store, ingredients: Sodium Bicarbonate U.S.P.)
    Waited 2 hours, let it circulate, after about 1 hour vacuumed bottom with filter setting to maybe stir up some that settled.
    FC - 1ppm
    CC - 3ppm
    pH - 7.0 (or less) STILL!?
    TA - 90ppm
    CYA - 80ppm (I'm ok with this being high given the almost all-day sun the pool gets)

    So I don't get it, 22lbs of baking soda for a 36k USG pool should definitely move the pH. I know my FC is really low, but I want to get the pH right before beginning the shock process. Any advice? Thanks in advance!
    36,000 Vinyl Pool, all day sun. Si-60 SWG, Hayward S-200 Sand Filter, 710X32 Multi-Valve, 1.5 HP Pump. Taylor K-2006 test kit, BBB method.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
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    May 2010
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    Re: New Pool Owner, Cannot raise pH

    Welcome to TFP!!!

    Your problem is you are using the wrong chemical ... baking soda raises TA not ph.
    Using the poolcalculator.com, 22 lbs in your pool would raise the TA by 44ppm and the pH by 0.09.

    Read Pool School (button at the upper right of the page). Specifically:
    pool-school/pool_water_chemistry
    pool-school/recommended_pool_chemicals
    Jason, TFP Moderator
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    Richard320's Avatar
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    Re: New Pool Owner, Cannot raise pH

    Wrong stuff as Jason said just above.

    Also, how did the CYA go up? Have you been using pucks or powdered shock?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  4. Back To Top    #4

    Join Date
    Jun 2013
    Location
    Wilmington, NC
    Posts
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    Re: New Pool Owner, Cannot raise pH

    Thanks for clearing that up! I'm glad I'm not going crazy. Just put 140 oz of Washing Soda in and will let that stir around. I'll check it in an hour or so and see how I'm doing.
    CYA went up because I still had the remnants of some trichlor pucks in the skimmers and floater. I just took them out. Hopefully I'll start shocking tonight.
    36,000 Vinyl Pool, all day sun. Si-60 SWG, Hayward S-200 Sand Filter, 710X32 Multi-Valve, 1.5 HP Pump. Taylor K-2006 test kit, BBB method.

  5. Back To Top    #5

    Join Date
    Jun 2013
    Location
    Wilmington, NC
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    6

    Re: New Pool Owner, Cannot raise pH

    Just tested the pH, it came up to 7.3 so that's a perfect place to start the shock process this weekend. Thanks for the help!
    36,000 Vinyl Pool, all day sun. Si-60 SWG, Hayward S-200 Sand Filter, 710X32 Multi-Valve, 1.5 HP Pump. Taylor K-2006 test kit, BBB method.

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