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Thread: Chlorine creates white cloud that rises to surface

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    Chlorine creates white cloud that rises to surface

    I am new to taking care of a pool. My father cleaned it for years but he can no longer do it. So this season I am in charge of clearing up our now green pool. I know the basics like chemical balance and all that stuff but something has me stumped.

    Whenever I add chlorine (granular) to the pool, it creates a white cloud after about 15 seconds which slowly rises to the surface. When it reaches the surface, it seems to evaporate. The pool will not hold any chlorine. After adding a ton of shock, the Free Chlorine and Total Chlorine levels are always at 0 after waiting a couple hours to test.

    The PH and Alk are too high, which I plan on fixing this weekend. Not sure if that would cause the problem though.

    Pool Info:
    Sand Filter
    20,000 gallons.

    Thanks for the help

  2. Back To Top    #2
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Houston, Texas

    Re: Chlorine creates white cloud that rises to surface

    Hi welcome to TFP! In order to help you we need a full set of current test results. Do you have a test kit or do you take a sample to the pool store? What type of chlorine are you using? What geographical area is the pool located in?
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Join Date
    Feb 2008
    Flower Mound, TX

    Re: Chlorine creates white cloud that rises to surface

    Welcome to TFP!

    When able, please post some numbers for us to see as zea3 has suggested. it is much easier to help you when we know what we are up against.

    Have you begun reading Pool School yet? There is a great deal of useful information in there for you. I would also suggest taking a look at the following article on defeating algae...

    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

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