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Thread: Clarification for DE filter backwash

  1. Back To Top    #1

    Join Date
    May 2014
    Millersville, MD

    Clarification for DE filter backwash

    I am backwashing for the first time. I have a Hayward Pro-Grid DE2420 filter. On the sticker it says I will need to add 3lbs of DE.

    So I've run the pump on backwash for a few minutes and my water doesn't seem to get clearer than this:

    I've tried going back to rinse, and then back to has maybe gotten a little better than the picture, but not much. Am I just not running it for long enough? I was under the impression I need to wait until it's completely clear. Am I wrong?

    Also wanted to clarify that if the sticker says I need to add 3lbs of DE, I should realistically add about 80% of that, so about 2.4 that right?
    ~21,000 gal, IG Vinyl w/Liner, Hayward Pro-Grid DE2420 DE filter, Built: ~2002, manual vacuum, K-2006 Test Kit

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Clarification for DE filter backwash

    I think you may need to just backwash more. When was the last time you actually opened the filter up for a thorough cleaning? See the DE Filter Cleaning Tutorial.

    If you do just backwash, then yes, only add 80%.
    Jason, TFP Moderator
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