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Thread: about adding DE to a sand filter

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    about adding DE to a sand filter

    ok, i actually had to call around this town and find someone that actually could order me DE, no one stocks it.....anyways, for fun, since the guy on the other line sounded like "what **** does this guy want with DE, is he crazy?", i thought i would have fun with him and ask him about adding DE to sand filters. He brought up a valid concern, DE is not uniform in size, particles can range from 1 micron to 1 millimetre according to wiki and a sand filter would not be able to pick up the smaller ones, blowing it all over my pool. How would that affect; My pool? Health of the bathers, my kids? Would a floc agent help remove the smallest ones? and would I have to repeat that process each time i added it to my filter.

    Help, i am starting to second guess my wish to use DE in my filter for an even cleaner pool.....your thoughts and comments would be much appreciated.
    Thank-you
    Blessed is the man who can laugh at himself for he will never cease to be amused.
    To teach is to learn twice.
    My Pool. 20 x 40 120,000 litres (about 30k gal) sand filter, a pump of some type...lol & a bunch of neighbourhood kids.

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    Re: about adding DE to a sand filter

    Some people report that the addition of DE has helped them clear a pool more quickly and others have reported not really being able to notice much difference. I am sure that there are many factors that contribute to whether one is successful or not when doing it.

    DE and flocculents differ in the manner of how they work. DE aids in the filtration process by trapping the smaller particles in the filter due to the DE being porous and having sharp edges to "grab" things. Flocculents cause the particles to clump or agglutinate so they are easier to vacuum up or filter.

    DE is unsafe when the dust is inhaled as it can cause lung irritation or damage much like silicosis. When it is wet or in the water, it is no longer able to be inhaled and presents no danger.

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    Re: about adding DE to a sand filter

    I used to add a little (about a cup) to my skimmer to "help" the sand filter out dead algae. It will make your pressure spike quickly as the sand bed becomes clogged. Keep a good watch on it. It does seem to help.
    Larry
    16x28 vinyl inground kidney, 1HP pump, sand filter, Compupool SWG, 11K gallons

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    NWMNMom's Avatar
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    Re: about adding DE to a sand filter

    Also keep in mind that it will generally pass out of the filter when you backwash as well. I use it to "polish" my water after an algae bloom shock or just when we get a bunch of tree pollen in the pool
    18x33x52 Buttressfree Seaspray (Wilbar) AGP - 1.5hp Pentair Maxim w/22" Pentair Meteor Sand Filter, Aqua Rite SWG System, Biltmore Walk In Steps - 2/4x20 Solar Panel Setup - Doheny Jet Drive (RIP -Pool Rover Jr) - finally hard plumbed the whole darned thing -
    Beats Driving to the Lake!

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    Re: about adding DE to a sand filter

    I use DE in my sand filter every now and then. A little bit is all you need to really polish your water. HD sells the stuff, but only in a 25 pound box, so I've got plenty for the next 50 years or so
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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    DCAG's Avatar
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    Re: about adding DE to a sand filter

    To add to what's already been said above (for those thinking to do this):
    Put only about 1/2 cup in a small container, fill with a bit of water, stir it up. Pour this milky concoction in skimmer. The important part is to wait 15 - 20 minutes, then check your pressure. About 1 psi increase is considered sufficient.
    If you have a large filter, you may have to add more.
    Some may like to do this after every backwash, but personally, I only do it a couple of times a season, as well.
    16' X 24' Wilkes Pools "Genesis", 10K Gal
    Hayward Powerflo Matrix 1 hp, & 18" Pro Series sand (S180T)

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    Re: about adding DE to a sand filter

    Quote Originally Posted by 257WbyMag

    When it is wet or in the water, it is no longer able to be inhaled and presents no danger.
    Thank-you, that is what i was looking for.
    Blessed is the man who can laugh at himself for he will never cease to be amused.
    To teach is to learn twice.
    My Pool. 20 x 40 120,000 litres (about 30k gal) sand filter, a pump of some type...lol & a bunch of neighbourhood kids.

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