Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Please Help - Cloudy Light Blue Water

  1. Back To Top    #1

    Please Help - Cloudy Light Blue Water

    The weather in California recently turned warm and our plaster, 20,000 gallon pool turned green. Implementing retail store advice including Yellow Out the pool is now cloudy and a light blue color. I have been cleaning the filter cartridge daily - the material in the filter changed from a green color to a white color. The chemistry is:
    PH < 6.8
    CYA > 100
    TA = 200-250
    FC = 22.5 ppm
    CC = 5 ppm
    Any help will be much appreciated.
    Thanks! PappaBear

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: Please Help - Cloudy Light Blue Water

    I assume you are in the shock process with the FC that high? Raise PH to 7.2 when you're done and FC falls to below 10.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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

    Re: Please Help - Cloudy Light Blue Water

    You have several problems if those test results are correct.

    You want CC to be zero. You need to shock, presumably continue shocking, the pool until CC is 0.5 or lower.

    You never want the PH below 7.2. Worse, when the FC level is that high the PH will read as higher than it actually is. That means that the PH could be really really low. I hope this test result is incorrect and that isn't the problem. But if PH really is that low, you need to get the FC level down to a level where the PH test works and start raising PH back up to something reasonable.

    CYA over 100 is very problematic. Try doing the CYA test again, but this time mix equal parts of pool water and tap water together, do the CYA test on that, and multiply the result by two. Hopefully CYA is closer to 100 than it is to 200, because even with CYA at 100, you don't have FC high enough to reach shock level (which is 25-39 when CYA is 100, and higher still if CYA is over 100). It will be much simpler to clean up the pool if you replace water until CYA is down to something more reasonable.
    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

  4. Back To Top    #4
    Voodoo_Pool's Avatar
    Join Date
    May 2011
    On the border AR/TN

    Re: Please Help - Cloudy Light Blue Water

    Welcome to the Forum!

    Let's start with a couple of basic questions, so that we can get you that troublefree pool you are looking for:
    1) What is your source of chlorination (pucks, liquid chlorine, SWG)?
    2) How do you test your water (pool store, test kit - type)?

    Next, I recommend reading these articles:
    pool-school/pool_water_chemistry Great primer.
    pool-school/chlorine_cya_chart_shock The relationship between CYA and chlorine.
    pool-school/recommended_levels Your 'target' ranges.
    pool-school/pool_calculator Easily determine amount(s) of chemical(s) to add and how it affects other parameters.
    pool-school/shocking_your_pool You will definitely want to do this with a CC of 5 ppm. I will point out that shocking is a process, not a product. It is a verb, not a Richard says.

    This will get you well on your way!
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts