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Thread: new plaster unknown streaks? pics

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    new plaster unknown streaks? pics

    After the pb replastered my pool, I have these bright white faded streaks which I have noticed only when there is shade over the pool. Direct sunlight hard to see. It starts from the center of the shallow end and run to part of the deep end and stop...as if someone spilled a bucket of paint. No where else on the pool does it have the same streaks. I have let the ph get to 8.2 for a day and quickly added acid

    If its scale, How quickly will scale form and will it feel rough? Also, why is it only in the center of the pool and not around the sides as I recall having scale a long time ago??

    Thanks for your help
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    24000 inground gunite(painted), 1 hp hayward superpump (220), hayward 244t, Goldline Aqua rite SWG (110) Kreepy Krauly 1.5 in piping, 30 year old pool

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    JasonLion's Avatar
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    Re: new plaster unknown streaks? pics

    From your description and the picture those streaks might be places where acid ran down towards the drain when they were acid washing the finish, assuming they did in fact acid wash the finish. Some minor streaking is unavoidable when acid washing. This looks a little worse than usual, but not dramatically bad.

    There isn't any way to be sure what it is from the picture. If it is calcium scale it will be rough to the touch, while acid wash streaks will be smooth.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Guest

    Re: new plaster unknown streaks? pics

    How new is the plaster job? It is not uncommon to see some mottling in new plaster. Often it's just the calcium hydroxide leaching out. What has the plasterer said about it?

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    Re: new plaster unknown streaks? pics

    After a a long poor customer service, they sent a guy that handles warranties and he said he doesnt know what it is. He thinks it might be dust or something that got on it. This streak is very smooth as it it was just part of the plaster...just a little whiter
    I will ask them if they acid wash the plaster. Are they supposed to acid wash it? they said they are going to come in and sand it or something and im not sure if sanding will actually help it if it is in fact an acid streak.

    Actually the picture hides the annoyance a lot more than in person. In the sunlight it is unnoticeable, but when its gloomy or shady its very annoying unappealing to the eyes as if someone spilled bright white paint along the floor.
    24000 inground gunite(painted), 1 hp hayward superpump (220), hayward 244t, Goldline Aqua rite SWG (110) Kreepy Krauly 1.5 in piping, 30 year old pool

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    JasonLion's Avatar
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    May 2007
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    Re: new plaster unknown streaks? pics

    They might have acid washed, they might not have. Some finishes, like DiamondBrite and PebbleTec always get acid washed, others not so much.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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