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Thread: First backwash-is this DE in the water now?

  1. Back To Top    #1

    Join Date
    May 2010
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    Lehigh Valley, Pennsylvania
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    First backwash-is this DE in the water now?

    I performed my first backwash and filter cleaning today. It's a Hayward DE 4820. I did one backwash cycle and then took the filter apart and hosed the grids off. This evening while swimming, I noticed small particles floating in the water. They look almost like small thin pieces of skin or really tiny jellyfish. Is this excess DE I am seeing in the water and is that normal?

    Thanks
    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

  2. Back To Top    #2

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    Re: First backwash-is this DE in the water now?

    That doesn't sound like DE to me. Do you have any test results for us to look at?

  3. Back To Top    #3

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    Re: First backwash-is this DE in the water now?

    It sounds more like white water mold or pink slime. Some of these things hang around forever if they aren't treated properly. Sorry...I'm not an expert but I know one will be along soon.
    Peter
    21' X 52" above ground
    1 HP Hayward Power Flow Matrix Pump
    Hayward EC40C DE Filter

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    In the Industry

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    Re: First backwash-is this DE in the water now?

    Any DE would normally be on the bottom of the pool and not be suspended in the water...unless you stirred it up while swimming.

  5. Back To Top    #5

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    Re: First backwash-is this DE in the water now?

    Here's the update. Test rsults from this morning:

    FC-4
    CC-0
    CYA-45
    TA-115
    CH - 60
    pH -7.6

    I donned the goggles and looked under the water before the filter was running and nothing floating around. Fired up the pump/filter and looked again 1/2 hour later. The particles were floating around again. I am surely hoping it isn't the white mold/pimk slime stuff. Pool has been maticulously maintained with the BBB method and I have really not had any other issues. It seems VERY coincidental that yesterday when I cleaned the pool ( I do this inside with goggles on) there was nothing. I then backwash and clean the filter grids and that evening I see this stuff. Also, nothing there when the filter was off and when I turn it on it reappears.

    Any thoughts????? Please help!!!!

    Thanks,
    Rob
    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

  6. Back To Top    #6

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    NE Ohio
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    Re: First backwash-is this DE in the water now?

    That is wierd. How big are the particles? White mold is supposedly 1mm to 5mm and looks like tissue paper fragments in the water. Obviously DE is much finer than 1mm so that might be a place to start.

    Can you get a sample in a bottle? Maybe someone can ID it for you.

    I'm really sorry I can't help with this.
    Peter
    21' X 52" above ground
    1 HP Hayward Power Flow Matrix Pump
    Hayward EC40C DE Filter

  7. Back To Top    #7

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    Re: First backwash-is this DE in the water now?

    They are maybe about 1-2 mm. Nothing as large as 5 mm.
    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

  8. Back To Top    #8

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    Re: First backwash-is this DE in the water now?

    I would give it some filter time. If you have just cleaned your filter grids, it may be a bit until they get things clear. Filter grids that are a little bit dirty will filter a bit better than perfectly clean ones will. Let the filter run, brush, and watch your FC for overnight loss of > 1 ppm.

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