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Thread: help, brownish stuff on the bottom of my pool!

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    Join Date
    Jun 2009
    Location
    nyc
    Posts
    16

    help, brownish stuff on the bottom of my pool!

    Took off the solar cover today to discover brownish stuff on the bottom of the pool that wasnt there yesterday. It brushes off easily and the water is clear. Do you think it is algae? I am going to do an overnight fc test tonight. I havent turned on my swg since 6/30 cause my fc tends to run high(running it for 2-4 hrs will make my fc 9-10). The only reason why I suspect algae is because I had an incident on 6/26 when the fc dropped to 0 after a day of sunlight and a few days worth of rainwater debris accidentally dumped in.

    Below is the running log of my tf100 kit results copied from my other thread:
    why-is-my-free-chlorine-so-high-and-other-tf100-questions-t14455.html

    tf100 kit results(7/6)
    fc: 4
    cc: 0
    tc:4
    ph: 7-7.2
    ta: 110
    cya: 20?(added 24oz of cyanuric acid on 6/27)
    temp: 81 degrees




    6/25 11a tf100 kit results
    fc: 10
    cc:0
    tc:10
    ph: 7.2-7.5
    ta: 120
    temp: 68 degrees


    tf100 kit results(6/26 9a)
    fc: 0!!!
    cc: 0
    tc:0
    ph: 7
    ta: 110
    temp 70 degrees


    tf100 kit results(6/26 4p)
    fc: 2.5
    cc: 0
    tc:2.5
    ph: 7.2
    ta: 110
    temp: 68 degrees


    tf100 kit results(6/27 11a)
    fc: 8
    cc: 0
    tc:8
    ph: 7.5
    ta: 110
    temp 74 degrees

    tf100 kit results(6/30)
    fc: 9
    cc: 0
    tc:9
    ph: 7.2
    ta: 110
    temp: 77 degrees

    tf100 kit results(7/1)
    fc: 7
    cc: 0
    tc:7
    ph: 7.2
    ta: 110
    temp: 77 degrees

    tf100 kit results(7/2)
    fc: 6.5
    cc: 0
    tc:6.5
    ph: 7.2
    ta: 110
    temp: 77 degrees

    tf100 kit results(7/3)
    fc: 6
    cc: 0
    tc:6
    ph: 7.2
    ta: 110
    temp: 76 degrees
    Finally vacuumed the floor of the rainwater debris.

    tf100 kit results(7/4)
    fc: 5.5
    cc: 0
    tc:5.5
    ph: 7.2
    ta: 110
    temp: 76 degrees

    tf100 kit results(7/5)
    fc: 5
    cc: 0
    tc:5
    ph: 7.2
    ta: 110
    temp: 79 degrees
    Intex Ultra Frame Metal ABG Pool 16' round x 48"
    4000gph intex filter pump hooked up to 1500gph filter pump to solar bear 4'x20" solar panel to
    intex swg to pool
    deluxe intex maintenance kit, clearview vacuum head, tf100 test kit

  2. Back To Top    #2

    Join Date
    Jun 2009
    Location
    nyc
    Posts
    16

    Re: help, brownish stuff on the bottom of my pool!

    After 4 hrs of swg, water was crystal clear and so blue that we decided to jump in for the first time since we set up the pool 3 weeks ago. Water was a toasty 84 degrees with the solar panel. It was great.

    tf100 kit results(7/6 6p)
    fc: 6
    cc: 0
    tc:6
    ph: 7-7.2
    ta: 110
    cya: 20?(added 24oz of cyanuric acid on 6/27)
    temp: 84 degrees


    Overnight fc loss test:
    tf100 kit results(7/6 9p)
    fc: 5.5
    cc: 0
    tc:5.5


    tf100 kit results(7/7 8a)
    fc: 5.5
    cc: 0
    tc:5.5
    ph: 7.3-7.4
    ta: 110
    cya: 20?(added 24oz of cyanuric acid on 6/27)
    temp: 82 degrees

    I admit I woke up late 3 hrs after sunrise so the pool got a little sunrise before I did the test but I had no chlorine loss at all! Maybe it was just dirt that had settled to the bottom after vacuuming on friday???
    Intex Ultra Frame Metal ABG Pool 16' round x 48"
    4000gph intex filter pump hooked up to 1500gph filter pump to solar bear 4'x20" solar panel to
    intex swg to pool
    deluxe intex maintenance kit, clearview vacuum head, tf100 test kit

  3. Back To Top    #3

    Join Date
    Jun 2009
    Location
    nyc
    Posts
    16

    Re: help, brownish stuff on the bottom of my pool!

    pics of our pool
    Attached Images Attached Images
    Intex Ultra Frame Metal ABG Pool 16' round x 48"
    4000gph intex filter pump hooked up to 1500gph filter pump to solar bear 4'x20" solar panel to
    intex swg to pool
    deluxe intex maintenance kit, clearview vacuum head, tf100 test kit

  4. Back To Top    #4
    reebok's Avatar
    Join Date
    Apr 2009
    Location
    Lakeland, FL
    Posts
    1,268

    Re: help, brownish stuff on the bottom of my pool!

    probably was. a picture of it would be good too.
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

  5. Back To Top    #5
    dattia's Avatar
    Join Date
    Jun 2008
    Location
    West Chester, PA
    Posts
    511

    Re: help, brownish stuff on the bottom of my pool!

    I think seeing the brown stuff on the floor makes everyone panic a little bit. I get it everyday. There is a highway that runs by my house and despite a nice tree barrier, I get a black dust all over my house all the time. It took me a while to realize that if it is falling on my house, it surely must be falling into the pool too.

    Pathetic as it sounds, I actually enjoy getting in to vacuum it up every day...
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

  6. Back To Top    #6
    AnnaK's Avatar
    Join Date
    Jul 2007
    Location
    Eastern Pennsylvania
    Posts
    1,134

    Re: help, brownish stuff on the bottom of my pool!

    Vacuuming does wonders for the odd brown stuff.
    AnnaK

    12,500 gal AGP, Hayward sand filter, Pentair 2-speed pump, timer.
    Please visit our Pool Issues pages for information about step weights, managing the solar cover, and PoolSkim.

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