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Thread: Organic Yellow Stains

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    todd.scallions's Avatar
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    Organic Yellow Stains

    I have organic stains on the walls and seams everywhere. The wife and I have been slowly cleaning it with Vitamin C tabs. This is very time consuming and I doubt we will ever be able to get it all clean. There are stains on the floor where earthworms sat and decomposed over the winter. I figured that most of this would fade after some sun, bleach and regular brushing but it seems that vitamin C is the only cure. Is there something else I can use to remove these stains? Something a little quicker and doesn't require me staying under water for extended periods of time? Here are my numbers:

    FC= 6-8
    CC= 0
    TC= 6-8
    TA= 70
    pH= 7.5
    CYA= 50

    We went out of town a few weeks ago and I added 8 gallons of bleach which brought my FC levels up to 16-18 and covered with solar. I thought that might help the staining but it didn't. Any suggestions? Also, is it ok to use a magnetic stirrer for the FAS-DPD chlorine test?
    1.) 27,000 gallons
    2.) Sand Filter
    3.) In-ground
    4.) Vinyl Liner
    5.) 1HP/63GPM

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    Mod Squad JohnT's Avatar
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    Re: Organic Yellow Stains

    If vitamin C removes them and chlorine doesn't, they aren't organic. Most likely iron stains. Check out Metal Stains
    for more information.
    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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    frustratedpoolmom's Avatar
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    SWSuburban Chicago, IL
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    Re: Organic Yellow Stains

    Quote Originally Posted by todd.scallions
    I have Also, is it ok to use a magnetic stirrer for the FAS-DPD chlorine test?
    Yes.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    todd.scallions's Avatar
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    Re: Organic Yellow Stains

    Sweet. Seems like a pretty straight forward process. Is it OK to get in the pool and scrub the stains using the sock method? Also, can you buy that stuff locally? My daughter's birthday party is this coming Saturday and the wife wants the pool to sparkle like a diamond. I'm in direct sunlight so if I don't put in any bleach today, I should be about down to 0 chlorine by tomorrow night. I can get started then if I can buy it locally.
    1.) 27,000 gallons
    2.) Sand Filter
    3.) In-ground
    4.) Vinyl Liner
    5.) 1HP/63GPM

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    frustratedpoolmom's Avatar
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    SWSuburban Chicago, IL
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    Re: Organic Yellow Stains

    If you are having a pool party saturday I wouldn't do the "AA treatment" right now, if I can be honest. I'd just get in the pool and try spot treating it while keeping your FC level on the low end of your range, but never below your min, and add the sequesterant (like HTH metal control). I'm just afraid you could end up with a bigger problem than a few stains which could put a damper on the party.

    Hope that makes sense.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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