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Thread: Pool only a year old. What are these stains?

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    Pool only a year old. What are these stains?

    This pic shows all three stains. The white stuff on the stone. The dark areas in the mortar and the "sandy" looking stuff as well. The area is completely dry, even though it looks wet. Can you tell me what is going on?
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    Re: Pool only a year old. What are these stains?

    Here's three WAG's......take 'em for what it's worth.

    The lighter area on the bullnosing looks like a chemical spill of some type....possibly acid but I doubt it.

    Ditto for the sandy looking area in the grout.

    The gray might be where the darker thinset underneath the tile is showing through. In other words, the tile man left too much thinset that squeezed up between the tiles and the colored grouting didn't cover it up.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool only a year old. What are these stains?

    They're on every brick and mortar joint. All 136 feet of them. It's not chemical. The grout/mortar answer is a good possibillity, though. Any other ideas?

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    Re: Pool only a year old. What are these stains?

    Is it a pool with an SWCG?
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
    Pumps: X3 Hybrid Pump (switches to SPA), 2HP Spa (additional, when SPA is on), and a 1HP For Waterfall
    8, 4x12 Solar Panels on the roof of the pool-house (~12' up)
    CAPTAIN JAMES T. KIRK: "I'M SORRY. I CAN'T HEAR YOU OVER THE SOUND OF HOW AWESOME I AM" (Thanks to TFP!)

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    Re: Pool only a year old. What are these stains?

    I still have virtually no idea what they are. To remove them I would try......

    1. Clorox...full strength, then rinse

    2. 3:1 solution of water/muriatic acid. Don't leave it on the grout for more than say about 30 seconds. It'll prbably foam up right away on grout so keep as much off it as you can.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool only a year old. What are these stains?

    Sorry. Yes. It is a pool that has a saltwater chlorine generator. The stains on the coping don't concern me as much as the stains on the concrete/mortar/grout or whatever it is. Those really, really scare me because they were pretty and white (white-ish) when new.

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    Re: Pool only a year old. What are these stains?

    Did anyone apply a sealer to the brick or concrete?
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
    Pumps: X3 Hybrid Pump (switches to SPA), 2HP Spa (additional, when SPA is on), and a 1HP For Waterfall
    8, 4x12 Solar Panels on the roof of the pool-house (~12' up)
    CAPTAIN JAMES T. KIRK: "I'M SORRY. I CAN'T HEAR YOU OVER THE SOUND OF HOW AWESOME I AM" (Thanks to TFP!)

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    Re: Pool only a year old. What are these stains?

    No sealer was put on. Am I totally screwed?

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    Re: Pool only a year old. What are these stains?

    Anyone have any other ideas/suggestions?

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    Re: Pool only a year old. What are these stains?

    It looks like chemical splatter - have you added acid by walking around the pool? My other guess would be salt stains based on the info, but it doesn't look like them.
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
    Pumps: X3 Hybrid Pump (switches to SPA), 2HP Spa (additional, when SPA is on), and a 1HP For Waterfall
    8, 4x12 Solar Panels on the roof of the pool-house (~12' up)
    CAPTAIN JAMES T. KIRK: "I'M SORRY. I CAN'T HEAR YOU OVER THE SOUND OF HOW AWESOME I AM" (Thanks to TFP!)

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    Re: Pool only a year old. What are these stains?

    When I add acid, I'm always real careful and do it right above the water so I don't spill any. These stains are around the whole pool, even where I've never added acid.

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    Re: Pool only a year old. What are these stains?

    My only guess would be splashed water (salt...).
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
    Pumps: X3 Hybrid Pump (switches to SPA), 2HP Spa (additional, when SPA is on), and a 1HP For Waterfall
    8, 4x12 Solar Panels on the roof of the pool-house (~12' up)
    CAPTAIN JAMES T. KIRK: "I'M SORRY. I CAN'T HEAR YOU OVER THE SOUND OF HOW AWESOME I AM" (Thanks to TFP!)

  13. Back To Top    #13

    Re: Pool only a year old. What are these stains?

    Is there any way to get the stains out before I seal it? Or better yet, can I color it before I seal it?

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