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Thread: Multiple brown spots along floor, along wrinkles

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    Onslow's Avatar
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    Multiple brown spots along floor, along wrinkles

    I'm trying to determine if it's sand or something else along the floor of my pool. They are located sporatically just ablut everywhere except the part of the floor the return aims toward. I try to get samples but they dissapate as I try to scoop up a small section.

    I spent about an hour vacuuming them yesterday and they've returned today. Very strange. Please help!
    * 18' x 33' - 48" oval AGP - new liner Summer 2014
    * Hayward Pro Series S210T Top Mount Sand Filter
    * Hayward Power-Flo Matrix 1 1/2 hp Pump Model SP5615
    (equipment on posts prior to summer 2014) Hayward PowerFlo 1 hp pump - Jacuzzi "Tidewater" 190L, sand filter

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    Re: Multiple brown spots along floor, along wrinkles

    I have similar problem. I believe it is just dirt. The dirt is so fine however that when I try to vacuum it up with the type of vacuum that connects to a hose.....it just goes thru the sock and clouds up the water until it settles again.

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    Mod Squad Bama Rambler's Avatar
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    Re: Multiple brown spots along floor, along wrinkles

    The best way to tell if it's dirt or algae is to run the OCLT. That will let you know if you need to shock or not.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    dattia's Avatar
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    Re: Multiple brown spots along floor, along wrinkles

    I get dirt/silt everyday on the bottom of my pool, usually gathering in the dents on the floor...well away from the return jet. My dog goes swimming every day and I just attribute it to what he is carrying in on his feet, and possibly blow in from the trees surrounding my pool. If your numbers are looking good, I wouldn't worry about it too much.
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

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    pepsiholic's Avatar
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    Re: Multiple brown spots along floor, along wrinkles

    My best guess would be dirt/silt. I have it everyday also. I use skimmer socks and vacuum daily, but it still comes back where the dents and a few wrinkles are. It's just so fine that nothing catches it. I keep my chlorine levels at the max end and did an OCLT just to make sure. If you're like me it's very frustrating to have crystal clear water and see dirt on the bottom...grrrr!...lol
    24 x 52 Round AG Outback Empire Pool 13,500 gal.
    1 HP Hayward Power-Flo pump w/Hayward 18" 150lb. sand filter
    TF-100 test kit & SpeedStir
    Wanda the Whale Vacuum

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    Onslow's Avatar
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    Re: Multiple brown spots along floor, along wrinkles

    Thanks all for responding to this. Sounds like it's normal. I guess I'm finding out now why everyone likes those high-dollar auto-vacuums .

    I've just quit adding DE after every backwash (TFP plug: Since the pool is now extremely sparkly) so that would explain the timing. I may look into going back to adding at least a small amount to try to slow the dirt without ratcheting the pressure gauge every day. Vacuum to waste would help prevent what nawie01 mentioned as well.

    Thanks all. Will do OCLT as well!
    * 18' x 33' - 48" oval AGP - new liner Summer 2014
    * Hayward Pro Series S210T Top Mount Sand Filter
    * Hayward Power-Flo Matrix 1 1/2 hp Pump Model SP5615
    (equipment on posts prior to summer 2014) Hayward PowerFlo 1 hp pump - Jacuzzi "Tidewater" 190L, sand filter

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    Re: Multiple brown spots along floor, along wrinkles

    got the same thing here in Mo. Got to looking at it closesly and noticed it was just dirt and nothing more..Vacume,vacume and vacume....Been really HOT here lately and dry so I guess its just the dirt in the air that gets attracted to the pool....

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