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Thread: Measuring DE

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    Measuring DE

    I see that I am supposed to put in like 2.4 lbs of DE. If I use a regular like cooking measure, is this equivalent to 38.4 ounces ?
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

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    Re: Measuring DE

    I would not be able to help you there. What I do is have a small scale and then put a cup on the scale. Notice the weight of the cup empty and then pour in what I need to make the weight go the appropriate weight.

    Just looked it up and you are right. 2.4 lbs=38.4 ounces

    Basically 2.4X16(Ounce in a Pound)=38.4
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
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    Re: Measuring DE

    I don't have a DE filter, but I would recommend measureing it out once into a container you can reuse. Then mark a line on the container and just fill it to that line in the future. Keep in mind that as JasonLion has said, you only need the full amount after cleaning the filter. After backwash you'll only need about 80% of that.

    (Mods, feel free to edit or delete if I didn't get that quite right.)

    -- Pete
    32x16 ft Grecian rectangular vinyl pool 8ft on deep end - 19000 gal. 18" Hayward S-240 sand filter. 250K BTU Pentair MasterTemp heater. Hayward 3/4 HP Super Pump.

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    JasonLion's Avatar
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    Re: Measuring DE

    DE is measured by weight. They do make special scoops that hold 1/2 lb of DE. Also, if you have a standard 1 lb coffee can, that is about 1/2 lb of DE, but that is a little less reliable as coffee cans vary a little bit.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Voodoo_Pool's Avatar
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    Re: Measuring DE

    If you don't want to actually weigh the DE powder on a scale, then I recommend going to your local pool store and purchasing a BLUE SCOOP. It is calibrated. Also, unless you take the filter apart and completely clean the grids to remove ALL of the old DE, then you do not need to add the full amount of DE powder. Backwashing does NOT remove ALL of the old DE powder. I discovered this when I removed the top of my filter for the first time after purchasing the house. So much old DE powder (from previous owner) existed that it formed a reverse image of the lid. This was after I backwashed and saw clear water in the sight glass. How do your grids look?
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

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    Re: Measuring DE

    Quote Originally Posted by Voodoo_Pool
    If you don't want to actually weigh the DE powder on a scale, then I recommend going to your local pool store and purchasing a BLUE SCOOP. It is calibrated. Also, unless you take the filter apart and completely clean the grids to remove ALL of the old DE, then you do not need to add the full amount of DE powder. Backwashing does NOT remove ALL of the old DE powder. I discovered this when I removed the top of my filter for the first time after purchasing the house. So much old DE powder (from previous owner) existed that it formed a reverse image of the lid. This was after I backwashed and saw clear water in the sight glass. How do your grids look?
    I am too much of a novice to open up the filter. That will happen eventually in due time once I get more comfortable with everything..
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

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    Voodoo_Pool's Avatar
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    Re: Measuring DE

    No way! Take charge! Do you have the owner's manual? If not...GOOGLE it! It really is NOT that scarey to take the top off your filter. You may be surprised, as I was, and it could save you a lot of frustration in the future. If you are not comfortable, so be it. But think about it.
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

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    Re: Measuring DE

    I have found that a 16oz Solo cup for drinking is a good way to measure DE.

    Doug

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    Re: Measuring DE

    Honestly Am I the only one who's read this :P
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

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    Re: Measuring DE

    Quote Originally Posted by precator
    I see that I am supposed to put in like 2.4 lbs of DE. If I use a regular like cooking measure, is this equivalent to 38.4 ounces ?
    1 gallon of DE is about 2.7 pounds.

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    Re: Measuring DE

    My owner's manual tells me that 1/2 pound of DE fills a 13 oz coffee can. So 2.4 pounds would fill 4.8 x 13 oz coffee cans. If like me, you buy coffee in a 34.5 oz can, it would be 1.81 x 34.5 oz cans.
    18,500 IG vinyl lined
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