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Thread: Running DE filter with less than recommended DE

  1. Back To Top    #1

    Join Date
    Jun 2015
    Uniontown, Ohio

    Running DE filter with less than recommended DE

    It has been an incredibly busy Sept/Oct including getting married/honeymoon, ridiculous work rush, and getting a (high maintenance) new dog. So the pool was lower priority, kept saying "I'll close it this weekend...", never did. Got very green, started cleaning it up to close it. Backwashed, then realized I didn't have enough DE.

    I'm in the middle of a SLAM right now. Went from green to cloudy from last night (topped off w/ bleach this morning and early afternoon).

    I figure I added about 3 lbs when it calls for 4.8.
    30,000 gal in-ground, concrete + fiberglass, two skimmers + main drain, 1.5hp Hayward pump, DE filter, in-line chlorinator, gas heater

  2. Back To Top    #2
    Mod Squad Jimrahbe's Avatar
    Join Date
    Jul 2014
    Bedford, TX

    Re: Running DE filter with less than recommended DE


    I think you are fine for now, but I would buy more DE and do the backwash again as soon as you can. It would not hurt, if you have not done if for a while, to go ahead and take the filter apart and clean the grids.

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Calder Spa.

  3. Back To Top    #3

    In the Industry

    Join Date
    Dec 2014
    Houston, Texas

    Re: Running DE filter with less than recommended DE

    Only thing that'll happen is the grids will get dirty faster thus increasing the filter psi and slowing your flow on the return and prolonging the clearing ability of said filter. Run it till the pressure gets close to 30 and pull it apart to clean as Jim suggested. Where it becomes damaging is when it's allowed to run with high pressure for prolonged periods, that when grids get crushed and should be replaced.

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