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Thread: Black spots brush away like dust or get sucked up by the vacuum

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    Join Date
    Aug 2014
    Location
    West Covina, CA
    Posts
    17

    Black spots brush away like dust or get sucked up by the vacuum

    My FC holds well and I don't have any green or mustard algae.

    The black spots in the pic brush away like dust or get sucked up by the vacuum. Sometimes I think its dust that settles in crevices in the plaster and sometimes i think its black algae.

    Any help would be greatly appreciated.

    20150118_133113.jpg
    IG Kidney Shaped 32x15 (Approximate width) 18,500 gallons. Plaster. Pentair FNS Plus D.E. Filter (No Multiport Valve). Hayward Superpump 1 1/2 HP. Using the Taylor K-2006.

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Black spots brush away like dust or get sucked up by the vacuum

    What you describe sounds like simple dust. Black algae won't vacuum up at all, and responds only to the most vigorous brushing.
    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

  3. Back To Top    #3

    Join Date
    Aug 2014
    Location
    West Covina, CA
    Posts
    17

    Re: Black spots brush away like dust or get sucked up by the vacuum

    Thanks for the reply. Sorry about posting in someone's thread. Didn't mean to hijack the thread but i figured since it was in line the topic it would be okay.
    IG Kidney Shaped 32x15 (Approximate width) 18,500 gallons. Plaster. Pentair FNS Plus D.E. Filter (No Multiport Valve). Hayward Superpump 1 1/2 HP. Using the Taylor K-2006.

  4. Back To Top    #4

    Re: Black spots brush away like dust or get sucked up by the vacuum

    Do you have a salt system?

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