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Thread: Green Stains - Cant Clean - HELP!

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    Green Stains - Cant Clean - HELP!

    I bought a house with a pool. The pool was closed for at least 2 years - maybe longer. It is in ground and a vinyl liner and 21,000
    gallons. It was a pond when I opened it - but have made great progress. The water is crystal clear. The bottom and sides have
    green stains. I have shocked it 6 times - once doing a double (4lbs). I have used Green to Clean from Leslies. I have tried two different
    algaecide. I have tried organic stain remover. I am at a loss. Any advice? See the picture below.
    Attached Images Attached Images
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    Butterfly's Avatar
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    Re: Green Stains - Cant Clean - HELP!

    You have made great progress!

    You can test an area for organic staining by holding a trichlor tablet on a stained area for one minute. If it lightens, then maintaining higher FC levels or shocking will lighten/reduce or remove them.

    If it doesn't lighten at all, you could test for metals stains by holding an unglazed/plain/cheap otc vitamin C tablet to a stained area for 30 seconds. If Vit C lightens the stain, then an AA treatment would help.

    I suggest you stop over and do some reading in Pool School, especially the article on How To Shock Your Pool.

    You only need bleach/liquid chlorine to clear and maintain your pool.

    Algaecides can have unwanted side effects (like copper - hard to deal with in your pool) and they are better at preventing than curing anything.
    Also, we only recommend one algaecide and that is PolyQuat60.

    Welcome to the forum
    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.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: Green Stains - Cant Clean - HELP!

    Thanks for the input.

    I have shocked the pool multiple times. I have been using Leslie's powder shock - calcium hypochlorite - Power Powder Plus. Last time I used 4lbs in my 21,000 gallon pool. Is their powder a good choice? Is this the problem that I am not shocking it enough and using the wrong product?
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    dattia's Avatar
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    Re: Green Stains - Cant Clean - HELP!

    Most of us use liquid bleach to shock our pools... and to maintain our pools. The most common mistake with shocking is that most people treat it as a one time thing, it is not, it is a process with a beginning and a definitive ending. Clear water, CCs of .5 or less, and an Overnight Chlorine Loss of 1PPM or less.
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

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    Re: Green Stains - Cant Clean - HELP!

    Any additional advice. I have kept the clorine high for a week - and also went through the shock process documented in pool school. No progress. I really think it is stains as I try to scrub it with a stiff brush and no luck.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    Mod Squad JohnT's Avatar
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    Re: Green Stains - Cant Clean - HELP!

    Quote Originally Posted by jmcnyc
    Any additional advice. I have kept the clorine high for a week - and also went through the shock process documented in pool school. No progress. I really think it is stains as I try to scrub it with a stiff brush and no luck.
    Have you done the Vitamin C test yet?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Green Stains - Cant Clean - HELP!

    Yes. Did vitamin c test and no results. Pool was closed for two many three years. Have green stains over most of the bottom and some sides. Shocked it a number of times. We use it this weekend the water is crystal clear. Any ideas.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    Butterfly's Avatar
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    Re: Green Stains - Cant Clean - HELP!

    What is the pool surface? vinyl, FG, plaster?
    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.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Green Stains - Cant Clean - HELP!

    The pool is vinyl It is about 10+ years old.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    Re: Green Stains - Cant Clean - HELP!

    Removing stains first involves identifying them as organic or non-organic. A picture(s) may help us do that. Can you post a picture and some current test results?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Green Stains - Cant Clean - HELP!

    Picture posted at the top of the thread.

    I suspect the stain is organic - the Vitiman C test didnt result in a fading of the stain. I have agressivly scrubbed the stain as well with no results.

    Thanks in advance for all the input.

    Jim
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    Re: Green Stains - Cant Clean - HELP!

    If the stain is organic on a vinyl liner, chlorine will remove it. It may take some time. What is your CYA ppm?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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