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Thread: Neglected pool. Is this scale?

  1. Back To Top    #1

    Join Date
    May 2013
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    Boca Raton, FL USA
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    Neglected pool. Is this scale?

    This pool was neglected while the house was unoccupied (foreclosure) and an investor brought it back to clear to sell the place. The pH was at 8 when I tested it. Is this calcium scale, or is the finish just messed up? The stained areas are definitely rougher than the unstained, but honestly, when you rub anywhere, the finish sorta flakes off in your fingers (like a course beach sand). There was a noticeable pile of this grit down by the main drain.

    Thoughts?



    35x17 Inground concrete/plaster. 19,500 Gallons.
    Hayward H250 LP heater, Hayward 1.5HP pump, Hayward cartridge filter.
    Useful Stuff: Test Kit | CYA/Chlorine Levels | Pool Calculator

  2. Back To Top    #2
    linen's Avatar
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    Jul 2010
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    Re: Neglected pool. Is this scale?

    If the stains are "rougher" than the surrounding material, then it sure looks like scaling.

    Post a full set of test results. See: http://www.troublefreepool.com/pool-...efore_you_post
    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

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    May 2013
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    Boca Raton, FL USA
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    Re: Neglected pool. Is this scale?

    Sorry --

    FC 7
    CC 0
    CH 210
    pH 8.0
    TA 100
    CYA 80
    35x17 Inground concrete/plaster. 19,500 Gallons.
    Hayward H250 LP heater, Hayward 1.5HP pump, Hayward cartridge filter.
    Useful Stuff: Test Kit | CYA/Chlorine Levels | Pool Calculator

  4. Back To Top    #4
    linen's Avatar
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    Re: Neglected pool. Is this scale?

    Your csi value is not extremely high (+0.41 assuming 90F water temp...higher than +0.6 is considered at risk for scaling) but that does not mean it wasn't high in the past. For now, you keep your ph at the low end of 7.2 and that will drop your csi down even further from 0.6. For details, see: http://www.troublefreepool.com/pool-...alcium_scaling

    If the discolored surface is not much rougher than the rest of the pool surface, you could try placing a vitamin C tablet on a spot and see if the stain disappears. If it does, then the stains are likely caused by some other metal in the water such as iron.
    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.

  5. Back To Top    #5

    Join Date
    Jul 2011
    Location
    Arizona & California
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    771

    Re: Neglected pool. Is this scale?

    I think Linen has it right. It looks like scale and then iron, that has deposited onto the surface making it rough and discolored.

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