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Thread: Deep end vinyl yellowish/greenish tan stain after opening???

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    CATCH94's Avatar
    Join Date
    Aug 2007

    Deep end vinyl yellowish/greenish tan stain after opening???

    OK...pool is open, water clear and beautiful, chemicals good... BUT stain in deep end??

    When I opened the pool, the water was crystal clear, but gunk on the bottom... mostly, uhm....... ::ick!:: worms!! with some leaves...not many as very few trees nearby. Ok, not a problem; have opened to worms every spring. Vacuumed it all out, got chemicals adjusted properly, but deep end "hopper" is stained. Huh??? This never happened before. Won't brush off (pool brush attached to pole). I haven't gotten myself bodily to the bottom yet to hand brush (water a bit cold for me yet! 78 still), so I cannot be sure. What is causing the stain? Left over "worm" material? Highly doubt metal issue as Mother Nature kindly refilled the pool for us over the winter (had to drain some out twice!!) Stain only covers the area where the worms were. Also there are 2 fist-sized spots in the shallow end (again where worms were). How do I clean this???

    FC: 4.0
    CC: 0
    AK: 90
    pH: 7.2/7.4
    CH: 150
    CYA: 50 (left over from last year... high CYA at end of longer using pucks)
    Taylor K-2006 test kit

    Also, my Nitro Wall Scrubber (only a week old) didn't seem to do anything with the "stain" although it cleans beautifully.

    Suggestions? HELP!!!!
    Attached Images Attached Images
    20X40 IG Vinyl (33K gallons)
    3 returns/2 skimmers/1 main drain
    Hayward SuperPump
    Hayward Sand Filter
    Nitro Wall Scrubber robot cleaner
    Taylor K-2006 kit

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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Deep end vinyl yellowish/greenish tan stain after opening???

    Elevate your chlorine levels for a week or so and my bet is the stains will disappear.

    Prove that they are organic (which I think they are) by holding a tri-chlor puck (if you have one) against the stain for a minute.........if the stain lightens up, it's organic and your elevated chlorine should take care of it.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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