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Thread: Newbie - added too much sodium carbonate?

  1. Back To Top    #1

    Join Date
    May 2014
    Menlo Park, CA

    Newbie - added too much sodium carbonate?

    My pH dropped from 7.6 to 7.0 over the last 6 days so I decided to add some EZ-CLOR pH UP to get back to an appropriate level. When I added the sodium carbonate, the water turned milky white almost immediately and has remained that way for the last 8 hours. Any and all suggestions on how to clear it up are welcome.

    Before I added the sodium carbonate, I tested my water with my Taylor testing kit:
    FC = 2.5
    TC = 2.5
    pH = 7
    TA = 130
    CA = 190
    CYA = 52

    I ran a demand test to determine how much sodium carbonate to add and the chart in the Taylor book said I needed to add 5lbs. My canister of ph UP said I should add the sodium carbonate directly to the deep end of the pool, so I did. After reading several postings on TFP, I now see that I should have added it to water then dumped the water in to the pool. The water immediately turned milky white and has remained that way.

    After about four hours of running the pool filter, I retested the water with the Taylor test kit and got these results:
    pH = 7.2
    TA = 115
    FC = 2.5
    TC = 2.5
    Br = 4
    CYA = 48
    CA = 180

    I will run the pump overnight to see if it clears up, but am very concerned it will remain milky. Any suggestions on clearing it up?


    Here are my pool stats:
    Pool was installed in July 2014
    35,000 gal in-ground pool
    Hayward CL100 automatic chlorine feeder
    Jandy Cartridge Pool Filter
    Zodiac Jandy Legacy pool and spa heater
    Sta-Rite Max-E-Pro centrifugal pump

  2. Back To Top    #2
    UN1017's Avatar
    Join Date
    May 2012
    Sacramento, CA

    Re: Newbie - added too much sodium carbonate?

    Welcome to TFP!

    The cloudiness should clear on is own, hopefully by morning.

    There are some other things worth noting:

    1.Your pH drop is likely due to the use of trichlor tabs in your feeder....which also means you can no longer afford an increase in your CYA.

    2. Your FC is too low for a CYA of 50.

    You might take a spin through Pool School and see how your levels are being affected. Also, your stated the pool was installed in July 2014. Did you mean 2013? Also, is your pool plaster?
    15'x30' IG - Roman-style - 14K - Pebble Fina Classico
    Filter: Jandy CL460 Pump: Jandy Stealth SHPF1.5 SWG: Jandy AquaPure 1400 Cleaner: Jandy RayVac Test Kit: TF-100 w/SpeedStir

    Chlorine/CYA Chart----Extended Test Kit Directions----SLAM

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Newbie - added too much sodium carbonate?


    Just keep the filter running. I also recommend raising FC up to about 8 using bleach (plain, unscented) and just be patient. It will eventually clear up.

    Now, off to Pool School with you! I especially recommend Those powdered forms of chlorine all carry some unwanted side effects, as you've just discovered.
    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!

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Newbie - added too much sodium carbonate?

    Welcome to the forum. I, too, think it will clear up with time and filtering. It's 20-20 hindsight but next time use 20 mule team borax and it will solve that issue.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Join Date
    Jun 2013
    SpringHill FL

    Re: Newbie - added too much sodium carbonate?

    Just curious how you got a cya of 52 and 48 my test cylinder is not graduated like that
    15x30 gunite 18k gallons Hayward star clear plus 120sqft cart

  6. Back To Top    #6

    Join Date
    May 2014
    Menlo Park, CA

    Re: Newbie - added too much sodium carbonate?

    Thanks for the help!!

    The pool is a little clearer this morning, but still pretty foggy.

    To answer your questions, yes, I meant 2013 and the yes the pool is gunite.

    For the CYA measures, I approximated based on where the bottom of the meniscus hit the scale. (I find the CYA to be difficult to measure precisely because the black dot in the bottom of the vial very gradually fades away.)

    Thanks again for your help!

  7. Back To Top    #7

    Join Date
    Oct 2013
    Chapin, SC

    Re: Newbie - added too much sodium carbonate?

    It's supposed to disappear gradually until it's completely gone, then see where the bottom of the level is. You can do it several times by putting it back into the shaker vial and dropping it in gradually again and again to test your skill at reading it. When You get the same reading twice in a row, that means you've got the hang of it!
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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