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Thread: Yellow Green / Brown Algae stains

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    Join Date
    Jun 2014
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    Terre Haute, IN
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    4

    Yellow Green / Brown Algae stains

    I have an 18x36 saltwater pool...opened in May and added typical chemicals, salt, and shocked....What I didn't do was clean out the bottom of the pool for a few weeks....When I did get around to vacuuming the leaves and worms out after I finished I noticed most of the pool surface that didn't have leaves or worms had a brownish/yellow stain....In the days that followed my chlorine level dropped to zero several times and I rechlorinated with shock....After consulting my pool guy we came to the conclusion that it was some sort of Algae, so I have super chlorinated and used black mold algecide twice and still I can't get rid of the stains....I also have noticed a cobweb or thin hair substance in the skimmer after cleaning...I am looking for some adivice...I know I can add more algecide and continue to chlorinate at high levels, but I'm wondering if I need to try "Stain Free" or "Metal Free" to see what they will do...
    Thanks,
    JH

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    Butterfly's Avatar
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    May 2007
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    South Carolina
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    10,045

    Re: Yellow Green / Brown Algae stains

    Welcome to TFP

    You should test to see if the stains are organic or metals. Try rubbing a cheap vitamin C tablet on the stain for a few minutes. If it lightens, the stain is from metals.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    Terre Haute, IN
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    Re: Yellow Green / Brown Algae stains

    Thank you I will have to try the Vitamin C tablets...Also wondering after doing some additional research if there is a possible correlation between using granular shock in my salt water pool instead of using liquid shock....and possible staining in my vinyl liner...This is the first year I have used the granular.l

  4. Back To Top    #4

    Join Date
    Jun 2014
    Location
    Terre Haute, IN
    Posts
    4

    Re: Yellow Green / Brown Algae stains

    Ok I tried the vitamin c pills and amazingly enough it actually removed the stain from the area....what is my next step to remove from the rest of the pool?

  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Terre Haute, IN
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    4

    Re: Yellow Green / Brown Algae stains

    Ok great results using approximately 3 pounds of stain-free made by natural chemistry about an hour after adding the stain free I added a stain and scale product as well all the time while my Chlorine level was around 0. After about 8 hours the stains had disappeared and I started slowly bringing my chlorine level back up

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