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Thread: Where can fine silt sneak through my sand filter?

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    Join Date
    Mar 2007
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    Ontario
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    Where can fine silt sneak through my sand filter?

    Hello,
    When I turn on my filter a fine silt like dust shoots out the returns for about 5 to 10 seconds,then
    runs clear.
    Its not filter sand and I don't even feel like I am catching it in a skimmer sock when held in front of return.
    I don't think its a cracked lateral, as I had it apart in the spring and check very very closely.

    My question is where else could this silt be sneaking through?

    Thanks for any advice!!!
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

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    Mod Squad Bama Rambler's Avatar
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    Re: Where can fine silt sneak through my sand filter?

    Fine silt can get through a sand filter. You can try adding a cup of DE to the filter and see if that helps.
    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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    Re: Where can fine silt sneak through my sand filter?

    what is your FC level? It sounds like you may be growing algae inside your returns.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Where can fine silt sneak through my sand filter?

    I bump it to around 5 or 6 at night my CYA is 30. I passed an overnight FC test a couple weeks ago when I first noticed ,but could check again.

    Thanks
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

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    Re: Where can fine silt sneak through my sand filter?

    Yeah, I'd take the FC up to around 10 for a few days just to see if things got better. I also suspect your pump run time could be increased a little if you're not running at least 8-10 hours daily. I would try both those things and see if the issue stopped. Post back if not.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Mar 2007
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    Ontario
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    Re: Where can fine silt sneak through my sand filter?

    Great thanks
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

  7. Back To Top    #7
    New2Me's Avatar
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    Jun 2008
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    SW Indiana
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    Re: Where can fine silt sneak through my sand filter?

    I don't see that you've listed what brand filter that you have, but you might have a problem similar to the one I described in this thread -
    http://www.troublefreepool.com/testi...t19811-20.html
    Good Luck, and best wishes
    22 x 40 IG vinyl lined, 23,570 gal.
    1 hp. Pac-Fab Challenger pump 300# sand filter
    Intex 8110 SWG, Hayward CL220 offline feeder
    Hayward 250K Btu gas heater
    Aquabots

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