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Thread: Odd Line of dirt

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    Merrimac, MA
    Posts
    47

    Odd Line of dirt

    Hi Guys,

    I have this line of dirt in my pool that appears and reappears with great regularity. I'll vacuum it up or the robot will pick it up and a day or two later it's there again. It's located in the shallow end of the pool just before the slope begins and just before a seam in the liner. I don't appear to be losing any water so I don't think it's a hole or tear in the liner. And as you can see the water is crystal clear.

    For good measure:

    FC = 5.5
    CC = .5
    PH = 7.4
    TA = 75
    CH = 113
    CYA = 70

    Here's a couple of photos.



    26,700 Gal., 18x36 IG pool with Vinyl. 1HP Hayward Super Pump; Hayward DE3620 Filter; Hayward SAS; TFT-100 test kit; Dolphin Atlantis Cleaner.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Odd Line of dirt

    That is very common. There is a slight lowering in water flow right there, so debris being carried around by the current tends to drop out and collect there.
    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
    May 2014
    Location
    Merrimac, MA
    Posts
    47

    Re: Odd Line of dirt

    That is very common. There is a slight lowering in water flow right there, so debris being carried around by the current tends to drop out and collect there.
    That's sort of what I was hoping, thank you for confirming!
    26,700 Gal., 18x36 IG pool with Vinyl. 1HP Hayward Super Pump; Hayward DE3620 Filter; Hayward SAS; TFT-100 test kit; Dolphin Atlantis Cleaner.

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