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Thread: Bleach damage to gray plaster?

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    Bleach damage to gray plaster?

    Hi; The guy whose company re-plastered our 2 pools said that using bleach will damage the plaster. I don't think he know what he is talking about but you these guys always try to blame anything wrong on the person taking care of the pool and not their workmanship. What are your thoughts?
    34,000gals-5.0ppm, 7.4-7.8 ph. 60 cyanuric acid level, Total alkalinity 80-110

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    JasonLion's Avatar
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    Re: Bleach damage to gray plaster?

    Any form of chlorine left sitting directly on the plaster can damage it. That is actually far more likely to happen with trichlor pucks, since liquid chlorine will mix into the water fairly quickly even if the pump is off.

    As long as you add bleach in the way we recommend, pour slowly in front of a return jet with the pump running, you will be totally fine.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Divin Dave's Avatar
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    Re: Bleach damage to gray plaster?

    tell him you are using sodium hypochlorite
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
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    Re: Bleach damage to gray plaster?

    Quote Originally Posted by woody99 View Post
    I don't think he know what he is talking about but you these guys always try to blame anything wrong on the person taking care of the pool and not their workmanship. What are your thoughts?
    I think you are 100% right.
    14K Freeform Gunite w/60% Blue Quartz plaster, Quad DE filter, Intelliflo VS Pump + Booster for Cleaner, Aquacal Heat Pump

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    Patrick_B's Avatar
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    Re: Bleach damage to gray plaster?

    He is absolutely wrong. If that were true all forms of chlorine would stain plaster. The only things Bleach ends up adding to your Pool is Chlorine, Salt, and Water.
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    Re: Bleach damage to gray plaster?

    Some plaster colors (pigments, generally organic) that are added to pool plaster will "bleach out" in any kind of chlorinated water. There are color pigments that don't "bleach out" at all, even with bleach being poured directly onto it -- and that is the kind of color pigments (inorganic) your pool plasterer should use in the plaster mix, and only use.

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