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Thread: Normal for this much DE in bottom of filter?

  1. Back To Top    #1

    Join Date
    Jan 2014
    The Woodlands, TX

    Normal for this much DE in bottom of filter?

    Took mine apart to clean today. Drain plug is very hard to reach, so shop-vacced out the standing water in filter housing.

    Is it normal to have about 10-12" of sludge in the bottom? Seemed like it was mostly DE.....pretty thick after sucking out the water.

    Just wondering if it had been over DE'd last time.

    15,000 gallon IG plaster with attached spa. Full Pentair EasyTouch system. IC40 SWG. TFT-100

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

    Re: Normal for this much DE in bottom of filter?

    Not uncommon. Which is why a full tear down is recommended yearly. Backwashing just does not work very well.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  3. Back To Top    #3

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011

    Re: Normal for this much DE in bottom of filter?

    Each time you turn off the pump, much of the DE drops off of the grates in the filter to the bottom, when the pump comes back on it swirls around and is redeposited on the grates. Naturally when you tear down the filter you find a lot of DE in the bottom.
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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