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Thread: Adding DE to a sand filter

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Kentucky
    Posts
    69

    Adding DE to a sand filter

    Hello I want to add DE to my ABG sand filter.. How much should I add? I am sure it is based on the pump's pressure and I am not sure how high I should raise the pressure.. Hope that makes sense lol....


    Thanks
    1) 16500 gallons
    2) 150 lb sand filter
    3) 28' AG DoughBoy
    4) Vinyl
    5) 1.5 hp
    6) TF-100

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    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Adding DE to a sand filter

    I've heard two different recommendations. The first is, add 1 lb DE (period). The second is, add DE until you see a 1 PSI rise in the pressure.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: Adding DE to a sand filter

    I recommend adding 1/2 a cup of DE, wait 60 seconds for things to settle, check the psi, and repeat until you know how much DE it takes to raise the psi by 1. Then you can use that amount of DE every time. For a small sand filter that will be much less than 1 lb, for a large sand filter it could be more than 1 lb. You only need to do the extra work once, and they you know how much to use.
    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

  4. Back To Top    #4

    Re: Adding DE to a sand filter

    I know this is a stupid question, Why would you add DE to a sand filter? Hey, Im new to this any info is good info to me .
    I got way more pool than i bargained for.
    Hayward super pump 3/4 hp. hayward 300 lb sand filter, Hayward vari-flo XL 75 Gal per min. Pool : vinyl ~ 22000 gal, size: 32x18. 3'-9' 1:2 rise/run slope. 1st year in this house. pool is swamp complete with tadpoles.

  5. Back To Top    #5

    Join Date
    Jun 2009
    Location
    Kentucky
    Posts
    69

    Re: Adding DE to a sand filter

    UGGG Let me try to post this AGAIN!!!!

    Adding DE to a sand filter will catch all the fine particles that the sand filter lets slide by..

    I added about 6 cups which seems to have brought it up 1 psi...
    1) 16500 gallons
    2) 150 lb sand filter
    3) 28' AG DoughBoy
    4) Vinyl
    5) 1.5 hp
    6) TF-100

  6. Back To Top    #6

    Re: Adding DE to a sand filter

    Momof3 Looks like you have it done. I would recommend that people verify thier pressure guage works before doing this.
    coloeb,
    20k gal. IG fiberglass/plaster rectangle 32'x16'
    Hayward Superpump 3/4 H.P. primary Hayward model 5060 Booster Pump
    Hayward Pro Series High Rate Sand Filter
    Pentair Model 320 automatic Chlorine/bromine in-line feeder

  7. Back To Top    #7

    Re: Adding DE to a sand filter

    thanks! so ya just add it via the skimmer a cup at a time.
    this is something i might look into.
    Hayward super pump 3/4 hp. hayward 300 lb sand filter, Hayward vari-flo XL 75 Gal per min. Pool : vinyl ~ 22000 gal, size: 32x18. 3'-9' 1:2 rise/run slope. 1st year in this house. pool is swamp complete with tadpoles.

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