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Thread: dirt stains will not come off

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    bolton, Ontario, Canada
    Posts
    2

    dirt stains will not come off

    I have a inground fiberglass pool, and i have dirt stains on the bottom of the pool I suspect that it is dirt scale from calcium. i drained my pool and i cant scrub it off any suggestions would be greatly appreciated

    .[attachment=0:1qaqbya2]pool bottom.jpg[/attachment:1qaqbya2]


    would filling the pool and dropping the ph to 6.0 -7 help??
    Attached Images Attached Images
    pool size ??, 1993 install
    hayward sand filter, jacuzzi 1.0 pump, ionizer

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    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: dirt stains will not come off

    Welcome to tfp, silverwolf101

    Are the stains rough to the touch?

    If not then:

    What does a vitamin C tablet and a little water do to a test spot?

    What does a trichlor puck and little water do to a test spot?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  3. Back To Top    #3

    Join Date
    Jun 2013
    Location
    bolton, Ontario, Canada
    Posts
    2

    Re: dirt stains will not come off

    No its not rough really smooth ran a bunch of tests ill post pics below. stopped before i got to muriatic. oh and thank you this place has already yielded some helpfull advice.
    .[attachment=1:1qfm32zh]before.jpg[/attachment:1qfm32zh][attachment=0:1qfm32zh]after.jpg[/attachment:1qfm32zh]
    Attached Images Attached Images
    pool size ??, 1993 install
    hayward sand filter, jacuzzi 1.0 pump, ionizer

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: dirt stains will not come off

    Your tests indicate the stains are organic. Elevate the chlorine in your pool to twice normal and then keep it there, perhaps for several days, and that should get most of it.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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