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Thread: temporary drain and fill "discolored" my plaster

  1. Back To Top    #1

    Join Date
    May 2010
    Location
    Dallas, TX
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    93

    temporary drain and fill "discolored" my plaster

    Specifically, my pool was resurfaced with pebble sheen (Riverbend Sandler's version of it here in Dallas) a little over a year ago. I don't remember the color name but it was a blue-colored plaster between the pebbles for an overall bluish look. I did a partial drain and fill (got it about half way down)- at most there was exposed surface for no more than 36 hours (and during daylight, it was mostly cloudy, so I wasn't getting intense sun). I noticed that the surface looked a little more "gray" when exposed; I continued to notice it after the refill, though I didn't pay attention as I was in the middle of fighting some awfully cloudy/dirty water (soil runoff due to horrendous rains). This was a few weeks ago. I'm now noticing that gray tint continue to stay around, and it ends right where the waterline got down to.

    PB told us the surface would get bluer over time. So possibly lack of water and direct sun exposure set me back a bit. It took a few days to get chemistry back after the fill but it was never far off (pH no less than 7.2, CH no less than 50-100 for a week, and Alk no less than 40-50 for less than 2 days).

    Not sure what else would be going on here besides a little temporary drying out? Scrubbing did nothing for it so there's no layer of something or other that's discoloring it.
    30k gallon IG PebbleSheen refinished 2014
    60sqft FNS Plus DE wih Proguard Cellulose, 1.5hp 2speed WhisperFlo
    TFTestKit and Stenner fixed 10gpd on timer with bleach
    Dolphin m500

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    Casey's Avatar
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    Apr 2007
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    SW PA
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    Re: temporary drain and fill "discolored" my plaster

    It could have been from the sun when you drained it. I don't know if time will correct it or not> Hopefully someone can answer this for you and set your mind at ease.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Join Date
    May 2010
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    Dallas, TX
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    93

    Re: temporary drain and fill "discolored" my plaster

    Yes- assuming it was just from the sun and drying out. I imagine (hopefully) it equalizes back out with time (though nothing yet).
    30k gallon IG PebbleSheen refinished 2014
    60sqft FNS Plus DE wih Proguard Cellulose, 1.5hp 2speed WhisperFlo
    TFTestKit and Stenner fixed 10gpd on timer with bleach
    Dolphin m500

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    May 2010
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    Dallas, TX
    Posts
    93

    Re: temporary drain and fill "discolored" my plaster

    Update: short of having any pictures to compare against, it seems like it was a lot better than it was, possibly even back to where it was initially.
    30k gallon IG PebbleSheen refinished 2014
    60sqft FNS Plus DE wih Proguard Cellulose, 1.5hp 2speed WhisperFlo
    TFTestKit and Stenner fixed 10gpd on timer with bleach
    Dolphin m500

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    JoyfulNoise's Avatar
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    May 2015
    Location
    Tucson, AZ
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    11,604

    Re: temporary drain and fill "discolored" my plaster

    Draining a plaster pool is always fraught with difficulties. Here in AZ where it gets blazing hot in the summer months (heck, May-Sept is blazing hot!), draining a pool under any circumstance is not at all advised. The plaster surface will dry out very quickly and the differential temperature between the plaster surface and the gunite below can get to the point where cracking can occur. Draining a pool half way is a bit worse because then you would have half the plaster surface at air temperature and half the surface of the pool at water temperature which can easily be a 20-30F difference (here in AZ).

    I suspect what happened to your pool surface is that, as the water line drained down, the exposed surface had water on it that dried out and left behind whatever solids were in your pool water (salts, calcium, stabilizer, etc). That probably formed a thin layer of grayish colored evaporite kind of like a gigantic water stain. Then, when you filled it back up, it took time for the new pool water to dissolve those mineral stains away. Calcium carbonate is particularly slow to dissolve once it forms a scale. With consistent management of your water balance and maybe aiming for a slightly negative CSI, any remaining stains should lighten up over time.

    Glad it worked out for you.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Join Date
    May 2010
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    Dallas, TX
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    Re: temporary drain and fill "discolored" my plaster

    Fantastic information- thank you!
    30k gallon IG PebbleSheen refinished 2014
    60sqft FNS Plus DE wih Proguard Cellulose, 1.5hp 2speed WhisperFlo
    TFTestKit and Stenner fixed 10gpd on timer with bleach
    Dolphin m500

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