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Thread: Adding DE

  1. Back To Top    #1

    Join Date
    Feb 2011
    Location
    Atlanta, GA
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    5

    Adding DE

    Hello everyone. We opened our new pool a couple of months ago and I have been learning as much as I can on this site. Thanks to you all for the great information. I bought the TFT100 test kit and my numbers look pretty good, except the Ph keeps drifting up, which from reading is normal for a new plastered pool. I am sure I am going to have a ton of questions as I go along this journey, but for now I just have one simple question. I bought a blue DE scoop from my local Leslie's. The woman behind the counter said she thought it held 1 pound of DE, but she wasn't sure. Since it was not labeled on the scoop and Leslie's website did not mention it, I called several more Leslie's stores to check for sure. Unfortunately, I started to get various answers - ranging from .5 pounds to 2 pounds. Does anyone know for sure how much DE those blue DE scoops hold? It is scary that Leslie's employees don't seem to know this simple information.
    22,500 gallon in-ground 36' x 18' free-form pool with Pebbe-Tec,
    Jandy DEV-60 DE filter, Jandy FloPro FHPM1.5-2 pump (1.5 HP 2-speed),
    Jandy Aquapure PLC1400 Salt Water Generator, Polaris 9300 robotic cleaner,
    2 skimmers, 4 return jets, 2 main drains
    RicoRock waterfall, JR Smith Hip Hop Diving Board

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Adding DE

    Most blue DE scoops hold 1 lb of DE, however I've occasionally seen blue scoops that hold 3/4 lb. Some of them are labeled on the bottom, or you can weight it empty and full.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Feb 2011
    Location
    Atlanta, GA
    Posts
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    Re: Adding DE

    Thanks Jason. There is no label on the bottom (unfortunately - that would be a good addition for Leslie's). I don't have a scale at home that would measure anything that light, so I guess I'd better buy or borrow one.
    22,500 gallon in-ground 36' x 18' free-form pool with Pebbe-Tec,
    Jandy DEV-60 DE filter, Jandy FloPro FHPM1.5-2 pump (1.5 HP 2-speed),
    Jandy Aquapure PLC1400 Salt Water Generator, Polaris 9300 robotic cleaner,
    2 skimmers, 4 return jets, 2 main drains
    RicoRock waterfall, JR Smith Hip Hop Diving Board

  4. Back To Top    #4

    Join Date
    Apr 2008
    Location
    Sugar Land, TX (suburb of Houston)
    Posts
    31

    Re: Adding DE

    I bought one from Leslie's a couple of years back. According to my scale it holds .75 lbs - I just scooped up the DE and weighed it, didn't tamp it down or anything.
    18K (I think) gal gunite pool, Pentair FNS DE Filter, Polaris 280 cleaner, TF-100 Test Kit

  5. Back To Top    #5

    Join Date
    Feb 2011
    Location
    Atlanta, GA
    Posts
    5

    Re: Adding DE

    Hey everyone. Just a follow-up if anyone is interested. I borowed a scale from a neighbor and found out that the blue Leslie's DE scoop holds .75 pounds of DE. This is after I was assured 100% by a Leslie's District Manager that it holds 1 pound. I was running the filter with 4.5 pounds of DE rather than the required 6 pounds for 1 week. Luckily the water remained clear - hopefully no negative results show up.

    Thanks to all that replied to my question.
    22,500 gallon in-ground 36' x 18' free-form pool with Pebbe-Tec,
    Jandy DEV-60 DE filter, Jandy FloPro FHPM1.5-2 pump (1.5 HP 2-speed),
    Jandy Aquapure PLC1400 Salt Water Generator, Polaris 9300 robotic cleaner,
    2 skimmers, 4 return jets, 2 main drains
    RicoRock waterfall, JR Smith Hip Hop Diving Board

  6. Back To Top    #6
    Diver's Avatar
    Join Date
    May 2011
    Location
    South of Boston
    Posts
    450

    Re: Adding DE

    if initial DE load is 6lbs, how much should be added after a backwash? half of that?
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

  7. Back To Top    #7
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Adding DE

    After backwashing you add about 80% of the initial load, or about 4 3/4 lbs in your case.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  8. Back To Top    #8
    Diver's Avatar
    Join Date
    May 2011
    Location
    South of Boston
    Posts
    450

    Re: Adding DE

    Quote Originally Posted by JasonLion
    After backwashing you add about 80% of the initial load, or about 4 3/4 lbs in your case.
    thank you!
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

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