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Thread: Brand New Pool with some black marks appearing

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    Richie Rich's Avatar
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    Brand New Pool with some black marks appearing

    I am freaking out on this one...is this algae or something else? The pool was filled on Friday the 21st and I have been monitoring the cc and ph closely and the PB has a pool guy coming to help with start up and will be visiting my house every Thursday for about 2 months to help me get going. But on Saturday afternoon, I noticed these small black marks on the gray plaster...is it staining or algae or ????? I have been brushing the entire pool three to 5 times a day and the pump has been on almost non stop since pool was filled.

    thanks
    Attachment 42345Attachment 42346
    Pool Build Finished 08/21/15
    17x30 IG Gunite pool/7' spa with gray plaster filled with city water
    Pentair VS 3 hp (pool guy set to run from 0600-1400)
    Pentair 420
    Pentair 400k heater

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    Hope Mills, NC
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    Re: Brand New Pool with some black marks appearing

    Looks like staining from something sitting on the pool bottom.
    16 x 32 17500 gallons
    Vinyl in-ground
    Hayward 250# Sand Filter
    1 HP Pump
    Hayward SWG

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    Richie Rich's Avatar
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    Re: Brand New Pool with some black marks appearing

    that's what I thought too, but I found these on the walls too...
    Pool Build Finished 08/21/15
    17x30 IG Gunite pool/7' spa with gray plaster filled with city water
    Pentair VS 3 hp (pool guy set to run from 0600-1400)
    Pentair 420
    Pentair 400k heater

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    Re: Brand New Pool with some black marks appearing

    It's hard to tell, but they kind of look like what I'm dealing with. Sorry, if I'm no help, but I will definitely keep an eye on this thread to see if you find a solution.
    20,000 gal gunite/white plaster, hayward cartridge filter, 2 speed pump

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    Mod Squad YippeeSkippy's Avatar
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    Re: Brand New Pool with some black marks appearing

    Did you fill with well water?

    Take a sample to the pool store and ask them to run a test for metals, but don't mention its a new pool. And don't buy anything they try to sell you! I know its so early and unlikely, but if it were my pool I'd just want to rule it out in my mind.
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

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    Richie Rich's Avatar
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    Re: Brand New Pool with some black marks appearing

    Quote Originally Posted by YippeeSkippy View Post
    Did you fill with well water?

    Take a sample to the pool store and ask them to run a test for metals, but don't mention its a new pool. And don't buy anything they try to sell you! I know its so early and unlikely, but if it were my pool I'd just want to rule it out in my mind.
    not well water, but I dont want to rule anything out...I will take a sample of water to Leslie's tonight after work and get it tested.

    I will post results in the morning.

    thank you
    Pool Build Finished 08/21/15
    17x30 IG Gunite pool/7' spa with gray plaster filled with city water
    Pentair VS 3 hp (pool guy set to run from 0600-1400)
    Pentair 420
    Pentair 400k heater

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    Richie Rich's Avatar
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    Jul 2015
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    Riverside, CA or Lake Havasu, AZ
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    Re: Brand New Pool with some black marks appearing

    I was just thinking that our dirt is all DG (decomposed granite) and I've noticed for the past couple of days there has been what looks like gold flakes in the water when I brush it...i assumed it was from the DG but could be the cause of these stains?
    Pool Build Finished 08/21/15
    17x30 IG Gunite pool/7' spa with gray plaster filled with city water
    Pentair VS 3 hp (pool guy set to run from 0600-1400)
    Pentair 420
    Pentair 400k heater

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    Richie Rich's Avatar
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    Riverside, CA or Lake Havasu, AZ
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    Re: Brand New Pool with some black marks appearing

    Ok, had the water tested at the pool store and they found no copper in the water and everything looked good except my chlorine was .5 and the PH was 8.1
    I went home and added 1/3 gallon of acid and then about an hour later added 1 gallon of liquid chlorine. this morning tested water (with very cheap test kit PB gave me) and chlorine was around 3.0 and PH was 7.5ish...

    other than that, how often should I use conditioner in the water?
    Pool Build Finished 08/21/15
    17x30 IG Gunite pool/7' spa with gray plaster filled with city water
    Pentair VS 3 hp (pool guy set to run from 0600-1400)
    Pentair 420
    Pentair 400k heater

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