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Thread: Gray film above water line

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    Join Date
    Jul 2013
    Las Vegas, Nv

    Gray film above water line

    I have a gray stain/film just above the water line in my pool plus the plastic character thermometers have a blackish sticky feel to them. The black on the wall does not feel sticky. What is it and how do I get rid of it?
    12K - Pebble
    Las Vegas, NV
    2 hp heyward pump
    Cartridge filter

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    pwrstrk's Avatar
    Join Date
    Aug 2012
    Elverson Pa.

    Re: Gray film above water line

    Can you post some test results please ?

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    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Gray film above water line

    A picture might be very helpful as well.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Gray film above water line

    I bet you chlorinate with trichlor pucks. Something in them reacts with something to cause that scum line.

    Try removing the stuff with a magic eraser, you can find it in the grocery store with the household cleaners.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  5. Back To Top    #5

    Join Date
    Jun 2011
    Long Beach, CA

    Re: Gray film above water line

    We get a gray type of film from sunscreen. We ask the parents to apply the sunscreen at least 15 minutes before their kids enter the pool, but they don't always do so and it forms a film on the tile above the waterline.

    Like Richard said, the magic erasers are what we use and they work great for removing it.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  6. Back To Top    #6

    Join Date
    Oct 2012
    Houston, TX

    Re: Gray film above water line

    I get the same thing and it appears to come from the black oily sooty smoke from my Tiki torches.
    Intex UltraFrame 14'x48in - 3,900 gallons. Intex 1600 GPH combo Sand Filter/SWG Hard Plumbed w/Hayward skimmer, suction & return. Borates.
    And... 15k gallon kidney shaped gunite 1975 vintage. Hayward DE3620 filter + Hayward 750 pump.
    TF100 Test Kit | Pool School | Pool Math

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