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Thread: using DE in a sand filter

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    Join Date
    May 2016

    using DE in a sand filter

    I am sure this has been discussed already, but my search terms (DE, sand, area) seem too generic to find the answer in the archives.

    I am looking into adding DE to my sand filter (Sta-Rite System 3, S8S70), and I have read that the small bags are better than the large ones (less mess).
    However I can't gauge the amount needed. My filter is 3.4 sqft, and the bags (EZ-DE Swimming Pool Diatomaceous Earth Filter Media) are sold for 36, 48, or 60 sqft DE filters.
    What is an optimal amount to use 2-3 times DE after backwash with my sand filter?


  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: using DE in a sand filter

    Welcome to TFP!

    More here about adding DE to a sand filter, Pool School - Add DE to a Sand Filter

    Also, you can add your pool info to your signature so that we can better help you. More here, Pool School - Read This BEFORE You Post
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  3. Back To Top    #3

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    YippeeSkippy's Avatar
    Join Date
    Jan 2012
    'burbs of Augusta, Georgia

    Re: using DE in a sand filter

    You don't need much at all. Mine takes about 2 cups to raise the filter pressure 1psi. Of course each time you backwash you're removing that DE, so you'd have to start again.

    I'd just buy the smallest amount I could to try it.
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