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Thread: DE - Common Name

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    DE - Common Name

    I am thinking about adding some DE to help clear up the dead algae - sand filter I have been shocking since sat and water is nice and blue still cloudy where do you buy it and is there a generic or common name for this stuff?
    27'x54" Matrix Resin - 200lb Pentair sand filter - 1.5hp Pentair optiflow 2 speed pump - Aquatrol SWG - Gorilla Pad

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    BoDarville's Avatar
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    Re: DE - Common Name

    DE stands for Diatomaceous Earth. DE is actually the common name for this product. Around here, I've seen it at Home Depot, Walmart, and pool stores. Just make sure you get a product labeled for use in pool filters.
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    Isaac-1's Avatar
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    Re: DE - Common Name

    Lowes also sells it around here in their pool section around $20 for a 24 pound box, I just bought some. Note pool DE and garden DE are processed differently, Pool DE is an inhalation hazard like silica dust, but garden DE is much lower hazard as it is heat treated and partly melted around the edges of the particles.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Richard320's Avatar
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    Re: DE - Common Name

    Techguy reported that Wal-Mart sells DE in a box called "Filter Aid".
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: DE - Common Name

    I have been using it for the past 2 days and it works well, my dosage is about 2 cups and I end up having to backwash every 4 or 5 hrs. The dirty water that comes out is amazing. At the same time you can see the pool move from green to blue. I got mine at a pool store for $15 / 10 lbs.

    You won't use much. At night I cut down to 1 cup so I don't worry about building up pressure due to not being able to back wash.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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    Re: DE - Common Name

    Thanks I am going to find some today.
    27'x54" Matrix Resin - 200lb Pentair sand filter - 1.5hp Pentair optiflow 2 speed pump - Aquatrol SWG - Gorilla Pad

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    Re: DE - Common Name

    Just make sure you get filter grade and not food grade DE. I don't know anything about the food grade, I just read somewhere there are 2 different grades.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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    Re: DE - Common Name

    Started DE last night do u have to add more each time you backwash?
    27'x54" Matrix Resin - 200lb Pentair sand filter - 1.5hp Pentair optiflow 2 speed pump - Aquatrol SWG - Gorilla Pad

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    Richard320's Avatar
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    Re: DE - Common Name

    Quote Originally Posted by swanny297
    Started DE last night do u have to add more each time you backwash?
    Yes.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: DE - Common Name

    I'm on my 3 rd day and my water is now Gin clear from using DE. Of course the DE that went through the back wash cycle is now in my yard. LOL

    But it was well worth it. I quit using it now and will rely on my sand filter.

    Another thing I noticed is if you turn your light on at night with the pump running you can see the little dirt particals in the water and that's a good reference on how your DE is doing.

    No particals, stop using DE.

    You will also note DE comming back into the pool through the returns. No big deal, it settles to the bottom and you vacuum them up and get to use them again.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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