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Thread: Pool bottom springy

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    ka8yiu's Avatar
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    Pool bottom springy

    We have had a lot of rain the last month to 6 weeks. Last night was no exception. My lanai and pool both borderline flooded.

    After cleaning and re-testing chems, I decide to cool off in the pool. I take about two steps, and I feel the bottom giving a little, almost like a spring board.

    Any thoughts if this could this just be the elevated water levels underground from the torrential rains we have been experiencing?
    8K gal IG Fiberglass (San Juan Waikiki I)
    TF-100 Testing Kit
    Hayward Max-Flo VS Pump
    Hayward Star Clear Plus Cartridge Filter
    Pentair Model 320 Automatic Chlorine/Bromine In-Line Feeder

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    Mod Squad Texas Splash's Avatar
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    Re: Pool bottom springy

    Do you happen to recall what was used for your base (pea gravel, sand?). If it was sand, it almost sounds like perhaps some of it settled leaving a small void in that area where the shell is flexing. Shouldn't be a concern unless the "giving" spreads more or you begin to see any changes in the shell itself (i.e. hairline cracks). Those shells are quite durable. Your water table could be influencing the base from underneath and/or perhaps some surface water seepage has traveled down along the pool sides causing it to settle more after initial construction. I know mine settled just a tiny bit.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    ka8yiu's Avatar
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    Re: Pool bottom springy

    We just bought this house in May, so I have no idea about the construction.

    I've "closed" the pool for a couple of days to allow the water to settle, then I'll check it again. Tnx
    8K gal IG Fiberglass (San Juan Waikiki I)
    TF-100 Testing Kit
    Hayward Max-Flo VS Pump
    Hayward Star Clear Plus Cartridge Filter
    Pentair Model 320 Automatic Chlorine/Bromine In-Line Feeder

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    ka8yiu's Avatar
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    Re: Pool bottom springy

    Traveling down the pool sides is also possible. The water has reached the coping and beyond.
    8K gal IG Fiberglass (San Juan Waikiki I)
    TF-100 Testing Kit
    Hayward Max-Flo VS Pump
    Hayward Star Clear Plus Cartridge Filter
    Pentair Model 320 Automatic Chlorine/Bromine In-Line Feeder

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    ka8yiu's Avatar
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    SW FL
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    Re: Pool bottom springy

    I just got in the pool to test that bottom give. It seemed solid and stable.

    I'm guessing the water table and/or some water getting up to the coping and running down the outside was just below the pool. All seems fine.
    8K gal IG Fiberglass (San Juan Waikiki I)
    TF-100 Testing Kit
    Hayward Max-Flo VS Pump
    Hayward Star Clear Plus Cartridge Filter
    Pentair Model 320 Automatic Chlorine/Bromine In-Line Feeder

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    ps0303's Avatar
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    Re: Pool bottom springy

    I see in your signature that it's an in-ground fiberglass pool. That thing should be solid.
    Paul
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