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Thread: DE filters - need more than backwashing? or no?

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    Join Date
    Jan 2013
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    The Great State of Texas
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    DE filters - need more than backwashing? or no?

    I am almost afraid to ask this as I figure it is a super basic question, but I am really new to this pool stuff. I closed on a house with a pool that has probably not been maintained correctly for some time. All equipment is running well from what the inspectors told me, and my own experience so far. I have backwashed the filter and added more DE (yes, I feel brilliant for figuring that out all by myself). The pool inspector told me that I didn't need to do anything more than that with the filter. I have had several pool contractors out to give me bids on updating pool and figuring out a cleaning system. The last guy out asked me when my filter was broken down and cleaned. Of course I looked at him like he was speaking another language (which always makes the contractors eyes bug out in the shape of dollar signs so I try to avoid doing that). He is bidding a tear down and cleaning of the filter. He is the only one that even mentioned it.

    So, is this something that needs to be done if everything seems to be going OK? And if this is something that can be done, is this possibly a DIY project? I hate paying contractors to do something that I can do myself without too much trouble. How often should it be done?

    Thanks y'all. I don't know what I would do without you!
    ~18,000 gallon
    DE filter/chlorine
    IG Grey Plaster
    25 year old pool w a facelift in 2014

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    linen's Avatar
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    Twin Cities, MN
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    Re: DE filters - need more than backwashing? or no?

    Here is the pool school article: http://www.troublefreepool.com/pool-...pool%20filters There is a link to a post that goes into detail on cleaning out a DE filter.

    As I understand it, eventually you will have to open all DE filters and give them a good cleaning. Some people clean them exclusively and don't rely on backwashing/bumping.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: DE filters - need more than backwashing? or no?

    Thank you so much Linen! I missed that some how. It looks like it will answer all of my questions!
    ~18,000 gallon
    DE filter/chlorine
    IG Grey Plaster
    25 year old pool w a facelift in 2014

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    Mod Squad zea3's Avatar
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    Jul 2009
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    Houston, Texas
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    Re: DE filters - need more than backwashing? or no?

    That's the way I do mine all the time. If you keep the pool algae free and don't get a lot of fine, wind blown debris you should only have to clean the grids once per season.
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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