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Diatomaceous Earth



Diatomaceous Earth is a fine, silty, soil-like substance that is composed of fossilized sea creatures.

It is also known as fossil flour, Celite, diatom remains, or DE.

The sea creatures that make up diatomaceous earth are diatoms, so they call the substance diatomaceous (di-a-tom-a-sheus) earth.

The picture on the right is of a diatomite / diatomaceous earth mine. All of the white material is diatomaceous earth, which is composed of microscopic diatom shells from diatoms that lived millions of years ago. This area was once the bottom of a vast lake where these diatoms lived.


What are Diatoms?

Diatoms are mostly single-celled marine creatures that are found in both fresh and saltwater and have existed for millions of years.

Since they are really tiny and hard to identify, the exact number of varieties of diatoms is unknown, but it is estimated that there may be a 100,000 different species of diatoms. These different types vary quite a bit, so there are smaller types of diatoms, larger ones, round shaped ones, oval shaped diatoms, long ones, and all sorts of variations of shell spikes.

Most diatoms can't move on their own, but some propel themselves along using a tail sort of thing called a flagella.

Diatoms have hard shells called frustules that are made of silica, the chemical that makes up glass and quartz. The frustules are often very sharp because they have many tiny, pointed tips on them. The tiny spikes are too small to cut us, but can affect other tiny creatures.

The pictures on the right are of two varieties of diatoms. This article has pictures of a diatomite mine and all the diatomaceous earth they are mining there is composed of just these two varieties of fossilized diatoms.

Quick Fact

Diatoms are one of the biggest bases for the marine food chain


Picture of Diatoms

Picture of Diatoms

What is diatomite?

Diatomite is a sedimentary rock made up of diatom shells, which means it is an organogenetic or biological sedimentary rock.

When diatoms die, their dead bodies sink to the bottom of the sea floor. Over time, millions and millions of diatom shells will cover the bottom and form a siliceous ooze (diatom shells are based on silica). As more and more of this siliceous ooze settles to the bottom, the pressure on the ooze builds up and eventually it gets pressed together, until it forms a rock.

That rock is called diatomite, and is similar to chalk, which is another organogenetic sedimentary rock.

Diatomite is really light

Diatomite is really light

Diatomite is really light

Fossilized Leaf in Diatomite


Fossils in Diatomite

As the diatom shells sink to the bottom of the lake or ocean, other things fall to the bottom as well.

Things like fish bodies and leaves settle down in the diatomaceous goo that forms on the bottom, where they get added to what may eventually become a rock as more and more diatom shells are added on top and compresses the goo into a solid mass.

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Millions of years later, the now fossilized leaf, fish body, or other items may become exposed after the area is uplifted or a creek runs through the area and eats away at the diatomite, or the area is mined for diatomaceous earth as in this case where this maple leaf was dug up by a miner.

Big Pile of Diatomaceous Earth

Big Pile of Diatomaceous Earth

Big Pile of Diatomaceous Earth

What is Diatomaceous Earth?

Diatomite isn't a tough rock and it easily breaks apart. When it eventually breaks apart into a loose powder, it is called diatomaceous earth.

Some mines purposely collect and break up diatomite to make it into diatomaceous earth and sell it to companies who will use it for pool filters, toothpaste abrasives, and polishing compounds.

Quick Fact

Diatomaceous Earth is often called DE for short

It's Snowing Diatom Shells


DE Varies in Density

Since fossilized diatom shells are hollow and have tiny spikes sticking out from all sides, they are very airy and even a pile of diatomaceous earth is fairly light.

It is quite different if the diatom shells are shaken together, they settle quite a bit and their spikes become embedded together which can make them into a very dense mass.

Some of the Many of Uses of DE

Diatomaceous earth has an incredible number of uses.

The most common uses of DE are for swimming pool filters and organic pest control. It's a great way to dry out areas that are chronically damp; ingested, it is considered a health aid.

Some of the other many uses of DE are listed here, though this list is nowhere near all inclusive.

  • Abrasive in Toothpaste
  • Dynamite Base
  • Safe Insecticide
  • Cake Mix Ingredient
  • Supplement in Livestock Feed
  • Ingredient for Odor Control in Horse Bedding
  • Swimming Pool Filter Material
  • Abrasive in Metal Polish
  • Animal Wormer
  • Colon Cleanser
  • Bonsai Soil Additive
  • Human Food Additive
  • Human Health Supplement
  • Protectant for Stored Grain
  • Activator in blood clotting studies
  • Garden Enrichment
  • Cat Litter Ingredient
  • Odor Control in Pet Bedding

Quick Fact

Diatomaceous earth is a main ingredient in dynamite. It prevents the nitroglycerin from exploding before it should.

Changing the DE Powder in a Pool Filter

Food-Grade Diatomaceous Earth vs. Treated Diatomaceous Earth

There are a few different varieties of diatomaceous earth out there. Two of the most popular kinds are food-grade DE and treated DE. Food-grade or food-quality DE is, as it sounds, safe for food. Many people feed this kind to their animals and some people even take it themselves. Like all diatomaceous earth, it will irritate the lungs if inhaled, but it is a regular additive to many food items on your kitchen shelves, and is safe to eat.

The other, more common, type of diatomaceous earth is treated, chemicalized, or swimming pool filter DE. This type of DE is very dangerous and should not be ingested and should definitely not be inhaled! The particles in this variety of DE have been changed to a more glass-like structure so they can purify water better, but this treatment makes it dangerous and therefore could cause internal damage if ingested.

Always check the labels on your diatomaceous earth to ensure it is the appropriate variety before using it in your pool filter or giving it to your animals since you can't tell the difference between the two by the naked eye.

Food-grade--safe to ingest

Pool filter--only for filters

Diatomaceous Earth Mixed into Feed

Diatomaceous Earth being mixed with ingredients for sheep feed. Salt and molodri.

Get a Good Amount of DE

How Much DE to Add to Your Pet's Feed?

I usually add DE to each animal's feed every day for two weeks after I get the animal, that clears out the chronic worms, etc that may live in the animal, then I give it to them every day for a week or so at the beginning of each month to prevent a recurrence.

The amount of DE to add to your pet's food varies depending on who you're asking, but don't worry too much about exact amounts, a guesstimate will do. Unless you use enormous amounts, you can't overdose on it, and even a little will help.

Just make sure to only use food grade diatomaceous earth. The kind used in swimming pool filters is very dangerous and should not be ingested.

These are just general recommendations on amounts of food-grade DE to add to dry feed:


Dogs that are 20-50 lbs get 1 TBs each day

Dogs that are 50-100 lbs get 2 TBs each day

Puppies that are less than 10 lbs get 1/2 to 1 tsp each day

Puppies that are 10-19 lbs get 2 tsp. each day


Cats get 1 tsp each day

Kittens get 1/2 teaspoon each day


Rabbits get 1/2 tsp each day

Small Animals

Hamsters/Gerbils/Rats get 1/4 tsp each day


Chickens get about a half a cup per 50 lbs of feed

Chicks get 1/2 tsp for each pound of chick starter


Goats get 1 lb for every 100 lbs of feed


Sheep get 1 lb for every 100 lbs of feed


Pigs get 2 lbs for every 100 lbs of feed


Cattle get 1 lb for every 100lbs of feed

Calves get 1/8 cup for every 2 gallons of milk


Horses get 1/2 cup each day

You can also just add some diatomaceous earth to whatever treats you are feeding your pets. Some animals don't like eating it dry in their food, so mixing it in with cooked oatmeal or something else sometimes works best. Just add a small scoop to the treats and don't use these measures if you do that though, these are the proper amounts for dry feed only since wet will be much heavier.

Using Diatomaceous Earth to Get Rid of Fleas Around the Yard

In order to get rid of fleas in the yard naturally, use diatomaceous earth and pour it around infested areas. Get rid of fleas in the yard naturally with diatomaceous earth by using tips from an exterminator in this free video on pest control.

Getting Rid of External Parasites

Most animals will get external parasites at one time or another. Whether they are mites or fleas or ticks, diatomaceous earth usually works well to get rid of them.

Cats and dogs can have DE rubbed into their fur, as can horses and other heavily furred animals. Chickens can also have DE applied to their feathers.

Adding small amounts of DE to the pet's bedding and living area will also help, and chickens should have DE added to their favorite dust bathing spots and nest boxes.

Just be cautious in how often you do apply it directly to your pet's skin, it is extremely drying and so can cause dry skin. Also, it's not good to inhale, so you don't want your pets to breath in too much of it.

Quick Fact

Diatomaceous Earth kills bugs by puncturing them with tiny spikes, then dehydrating them, not by being poisonous

DE is Good for People Too

Many people regularly ingest diatomaceous earth for it's health benefits. It is chalky and not very yummy, but DE doesn't taste horrible, and is easy to mix into items like drinks so you won't even notice it's there.

As always, make sure you are using food-grade DE and take about a teaspoon and a half each day for a week or so. After the week is up, take a teaspoon for three days each month. I like to add my DE to hot cereal or casseroles, but anything works.

Quick Fact

Diatomaceous earth is also a good blood clotter. If you cut yourself and don't stop bleeding right away, dab your wound a with a little DE and it will clot right up.

Rotary Kiln to Dry Diatomaceous Earth


Rotary Kiln Dried Diatomaceous Earth

After the miners collect loads of diatomaceous earth from the mine, it then enters a rotary kiln like this to dry it out. It works like a clothes dryer, rotating with lots of heat inside, so the de bounces around and gets well-exposed to the extremely hot air to become thoroughly dry.

Getting the DE dry is important because the diatomaceous earth in the mine is exposed to the weather and they don't want it being saturated with water. This also makes it lighter and easier to deal with.

Diatomaceous Earth Processing Facility


Diatomaceous Earth Packing Facility

The now-dry diatomaceous earth then enters this section of the factory where it is loaded into trucks to go to the packaging facility.

Quick Fact

Many of the biggest deposits of Diatomaceous Earth came from the Pliocene and Pleistocene epochs, or The Ice Age

More Information on Diatomaceous Earth - Learn more about Fossil Flour

Get Diatomaceous Earth Now

© 2009 Alisha Vargas

Reader Feedback

tonyaalves3 on October 17, 2013:

I started using the product for my pet fleas. Thanks for sharing

maryseena on April 01, 2013:

Very interesting article. Thank you for the wealth of information.

anonymous on February 26, 2013:

What an interesting subject. I had no idea...

jean valdor on February 23, 2013:

I've never heard of diatomaceous. Never use it but great info. Thanks for sharing

WindyWintersHubs from Vancouver Island, BC on January 23, 2013:

Great info on this soil-like substances. I haven't heard of it before and great to know it has many uses. Blessed!

OUTFOXprevention1 on December 24, 2012:

Great information. Thanks for the share.

Emilee46 on December 20, 2012:

great lense, you have a great artikel in your lense about diatomaceous earth.

Kevin Matson on October 21, 2012:

I love your lens. I've never heard of diatomaceous earth before, and never used. But I like learning new things. So thanks!

Kaiote on October 20, 2012:

Wonderful Lens, a lot of great information here.

anonymous on October 04, 2012:

@AstroGremlin: Food Grade Diatomaceous Earth is totally organic and safe. It contains less than 1% percent of Crystal & Silicon. Some of the uses for Diatomaceous Earth include; household pets, gardens, flower beds, field crops, grain storage, and livestock feeding.

You can also find this product at

Alexandra Douglas from Florida on August 28, 2012:

We use D.E for our coops! Great lens. Feel free to check out mine.

Alisha Vargas (author) from Reno, Nevada on August 01, 2012:

@anonymous: Yep, only food grade is safe to use

Cinnamonbite on August 01, 2012:

Some people claim it helps with bed bugs.

anonymous on July 12, 2012:

My 2nd visit! I'm back to bless this lens! :) *Blessed by a Squid Angel*

anonymous on July 10, 2012:

@JoanieMRuppel54: Did u use the food grade

Jo11 on May 02, 2012:

Only recently heard of this stuff and have been researching - your lens has been very informative, excellent. Can't wait to purchase some for myself and all my domestic and farm animals.

poppy mercer from London on May 01, 2012:

I've never heard of this...Thank you for teaching me something totally new!

AnnaleeBlysse on April 21, 2012:

So much information here! Happy Earth Day!

jed78 on April 13, 2012:

We use DE around the farm for all the above stated reasons, good stuff

dahlia369 on March 25, 2012:

Very interesting! I knew about DE and heard about some of the uses - but this lens very much expanded my horizons, thank you!! :)

Melody Lassalle from California on March 24, 2012:

We've used DE to kill ants in the yard. It works great!

gpsjim on March 24, 2012:

Really interesting, have never heard about it before!

SallyForth on March 23, 2012:

Nice article on diatomaceous earth. Very interesting.

AstroGremlin on March 23, 2012:

What a super lens. Diatoms and the deposits they create are interesting for practical reasons and ordinary curiosity.

Ellen Gregory from Connecticut, USA on March 23, 2012:

Very interesting a lot of new information. The only thing I ever read about Diatomaceous earth was that a snake will not cross a line of it. Makes sense after reading this.

anonymous on March 23, 2012:

It was quite useful.Thanks for such a lens.

Elyn MacInnis from Shanghai, China on March 23, 2012:

This was really interesting. I knew about using it in toothpaste, but not for anything else! Thanks for this interesting and informative lens.

wheresthekarma on March 22, 2012:

This is such an interesting lens. I use DE for my dogs for a natural flea and tick repellent.My dog and I also take it orally, we both have lyme disease and its supposed to help.

Clairissa from OREFIELD, PA on March 22, 2012:

Great info! I never knew there were two kinds and one was edible. Thankfully, you mentioned this or I would have been trying to eat my pool chemicals. :)

Stephen Bush from Ohio on March 22, 2012:

It was all news to me! Thanks for the fresh overview.

anonymous on March 22, 2012:

Interesting lens on diatomaceous earth. I've seen it also used as a short term filtering medium in aquariums.

BuddyBink on March 22, 2012:

Very interesting. I have never heard of this before, Thanks for the information.

IYenForZen on March 21, 2012:

I have never heard of this and found your lens fascinating! Great read!!

anonymous on March 21, 2012:

Well put together! I heard of DE a year ago, but I haven't tried it yet.

anonymous on March 21, 2012:

That was really informative, thank you!

iWriteaLot on March 20, 2012:

I have to tell you - this is NOT the type of lens I'm normally interested in. Your title and your intro picture are what really attracted me, so kudos for that. But it's your writing that really kept me on the page. You took what, to me, would have been a boring topic, and held my interest all the way to the end. So much so, that now I want to know more about this! Great job!

Joanie Ruppel from Keller, Texas on March 20, 2012:

I use DE for my pool filters but never knew about it's other uses. Thanks for a very informative lens!

Tom Maybrier on March 20, 2012:

I love this lens! Great work.

Ribolov LM on March 20, 2012:

Nice lens, nice pictures, great infos. Thnx for this lens.

intermarks on March 20, 2012:

This is really something new to me. Thanks for the information. I learn a new thing today.

anonymous on March 20, 2012:

Hi, I am worried. I would like to find out the truth, that is, whether DE is dangerous to Earth Worms & Dung Beetles and/or other soil dwelling creatures. If a small amount is used in a mineral supplement for Livestock, as a parasite control, is there a chance that the DE can pass through the animal and then be dangerous to these tiny creatures.

Great information here though, but I do wonder and worry about the necessary good bugs.

Thankyou for your help! Much appreciated!

fivee05 lm on March 20, 2012:

Interesting! This is the first time I have heard about diatomaceous earth.

Rosaquid on March 19, 2012:

This was a fascinating lens. Thanks for the info!

justin42 on March 19, 2012:

All I can say is WOW! What an incredible, well written and informative lens. I am going to have to keep an eye out for DE and apply it to all of the usages that you have written about here. Thanks.

jlshernandez on March 19, 2012:

We use this in our pool filter. Thanks for sharing all the info.

healthtruth lm on March 19, 2012:

great lens

livingfrontiers on March 19, 2012:

I love your lens! The photos and story are more than I knew about DE and I really appreciate all the information. I have heard about DE before, and have kept it in my arsenal when fleas are a problem, but so far, haven't needed to buy it. With your lens, it makes more sense why everyone loves DE. Thank you!

anonymous on March 19, 2012:

Enjoyed stopping by to see this, thank you.

StrongMay on March 18, 2012:

I just took a geology course, and I learned about DE there. What I didn't learn is that people and pets EAT it?!!! I'll check my toothpaste ingredients.

Chazz from New York on March 18, 2012:

I never knew there were so many uses for diatomaceous earth other than it being considered a safe pesticide. I'm definitely going to put it to more uses. Blessed and featured on "Wing-ing it on Squidoo," my tribute to the best I've found on Squidoo since donning my wings.

Othercatt on March 18, 2012:

I use diatomaceous earth for my chickens and dogs. It keeps the fleas off the dogs and the mites off the chickens. It also keeps the chicken coop from stinking. I recommend it to everyone.

miaponzo on March 18, 2012:

I just love anything fossils! I had never heard of this before! Blessed!

Peggy Hazelwood from Desert Southwest, U.S.A. on March 18, 2012:

I've used DE for a wormer for my cat and as a bug killer. Good stuff!

getmoreinfo on March 18, 2012:

Very nice, I like how you put together this information. Have a great day!

10incbellevue on January 15, 2012:

Wow. I have never heard of this stuff. Thanks! Great lens...very informative.

Pooluser on September 22, 2011:

Very informative lens, I only recently learned about DE (still have to pronounce it slowly). I didn't know it had so many uses.

MustangHistory on September 21, 2011:

Great lens, I use de in my garden.

katesmart on September 20, 2011:

Awesome lens! Already knew some information BUT learned a lot more. I was very curious about where it was found and how it was processed. Thank you!

howtocurecancer on May 05, 2011:

Blessed by a SquidAngel.

Emily Tack from USA on May 01, 2011:

I was so delighted to see this Lens! One of our guinea pigs was "brought back to life" with DE, after everything else failed to rescue him - including antibiotics. I had forgotten about food grade DE, even though I used to use it. For several weeks, I have been taking it again. Spectacular job, here, and can't say enough, how I enjoyed it!

VivekS on July 07, 2010:

it's always great to know new things that you can pass on and that's worth reckoning. three cheers for all the good share. thanks

Joan_W on April 27, 2010:

I was wondering where diatomaceous earth came from! I've used it for pest control, but I didn't realize there was a food grade variety available. Thanks!

LarryCoffey LM on April 10, 2010:

Very interesting!!

anonymous on March 31, 2010:

Nice lens. Informative. Thanks.

labchef lm on February 01, 2010:

Interesting lens. I enjoy reading it.

Demaw on November 08, 2009:

I see there are many uses for DE, I had only used it for pests. Good info. 5*

Seeking Pearls from Pueblo West on August 27, 2009:

Really interesting lens. Thanks for sharing.

Dee Gallemore on August 26, 2009:

Another thoroughly excellent lens . . . learned a lot!

Cynthia Sylvestermouse from United States on August 03, 2009:

Excellent educational lens! I like the way you break it down so that people who are not scientist can understand and appreciate the content..

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