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Thread: I've stained my vinyl liner....

  1. Back To Top    #1

    Join Date
    Dec 2012
    Location
    Chinag Mai, Thailand
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    14

    I've stained my vinyl liner....

    I've just noticed that I've managed to stain the vinyl liner in the pool in my new rented house.

    99% sure I've done it with two different chemicals, once with cyanuric acid and once with Borax.

    The stains look like light brown/tan patches about an inch to 3 inches across, both the stains look similar even they were caused by different chemicals.

    The pool liner is light blue.

    Is there a way to get rid of them?

    Thanks in advance,

    Tom.
    Vinyl Liner Pool
    75,000 Litres
    Minder X20CLS SWG

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
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    Re: I've stained my vinyl liner....

    Brown/tan patches sound like iron stains. If you have iron in the water, adding borax could cause staining, though adding CYA should not have (borax is basic, while CYA is acidic). Borax should always be pre-dissolved and poured slowly in front of a return jet (with the pump running) to avoid the possibility of problems like this. CYA should be adding by putting it in a sock and placing the sock in the skimmer, which will also avoid any possibility of something like this happening.

    Try holding a vitamin C tablet against one of the stained areas for 30 seconds to a minute. If they are indeed iron stains the stain should vanish, or at least lighten significantly, right around where the vitamin C tablet was. If that works you want to do an ascorbic acid treatment to remove the entire stain. If that doesn't work, write back and we can try some other possibilities.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  3. Back To Top    #3
    Butterfly's Avatar
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    Re: I've stained my vinyl liner....

    Can you post a pic of the stains? Are there only two small stains?

    If the stains test positive for metals, & if they cover a small area, you could treat them with a sock filled with crushed cheap vitamin C tablets (instead of doing a complete ascorbic acid treatment).
    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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  4. Back To Top    #4

    Join Date
    Dec 2012
    Location
    Chinag Mai, Thailand
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    14

    Re: I've stained my vinyl liner....

    Hi Guys,

    Apologies for the late response, I didn't have my notifications set up correctly.

    Ok, so I dropped a vit c tablet on one of the stains but I have a feeling that not all vit c tablets are created equal, it just kind of gave off some funny coloured liquid that is now on top of the stain.

    Do I need to go and find a different sort, or is there another option? I think I have access to ascorbic acid quite nearby if required?

    Attached is a picture of one of the stains, although it's not the best - I don't think the camera knows that it needs to focus on the bottom of the pool

    Thanks,

    Tom.
    Attached Images Attached Images
    Last edited by Tomster; 02-25-2014 at 02:44 AM. Reason: Image trickery
    Vinyl Liner Pool
    75,000 Litres
    Minder X20CLS SWG

  5. Back To Top    #5

    Join Date
    Dec 2012
    Location
    Chinag Mai, Thailand
    Posts
    14

    Re: I've stained my vinyl liner....

    Right, looks like the vit c tablet I used had rosehips in there, which i've read elsewhere may have been what the problem was.

    I will get some ascorbic acid later, what's the best way to test the stains with this?

    Thanks,

    Tom.
    Vinyl Liner Pool
    75,000 Litres
    Minder X20CLS SWG

  6. Back To Top    #6
    Butterfly's Avatar
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    Re: I've stained my vinyl liner....

    Well, you could put some AA in a sock and hold it on the stain for about 30 seconds/one minute and see if it lightens.

    btw, it is best to use the cheap non-coated Vitamin C tabs.
    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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