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Thread: Problem with DE Filter

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    Problem with DE Filter

    I went on vacation a couple weeks ago and pool turned green with algae. I finally cleared it up after about 5 days. Now when I start the filter, it shoots green through the jet for about 30 seconds. I have a hayward DE Filter, in ground pool. I took the filter out and cleaned it all off and added DE back to the filter. This morning I turn the filter on and it shot the dirty green through the jet again. Any suggestion to help me out with this situation? Thank You!

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    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Houston, Texas

    Re: Problem with DE Filter

    Is this the filter with the fingers? If so did you just hose them off or did you soak them?
    TFP Moderator
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    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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    Re: Problem with DE Filter

    It is the filter that is about 2 1/2 feet high and you take the filter out and hose it off. I got it totally clean before I put it back in.

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Problem with DE Filter

    Sounds to me like you didn't fully complete the shock process.
    Did you pass the OCLT (Overnight Chlorine Loss Test) outlined in Pool School?
    Which test kit do you have?
    What are your test results?

    Have you closely inspected the grids/fingers in the filter to make sure there are no tears in them?

    I'm thinking that there's algae growing in the filter/plumbing and when you shut the pump off it gets to blooming and then when you fire it back up it shoots out the return.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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