Diatomaceous earth is made from the fossilized shells of diatoms, an ancient kind of algae.

As time passed, these microscopic shells, consisting mostly of the mineral silica, accumulated in freshwater lake beds and formed huge silica deposits.

When mined and ground into powder, it becomes what we call diatomaceous earth. This chalk-like powder is microscopically very hard, coarse, and absorbent, which makes it useful for many things.

There are different kinds of DE, known as grades. Which grade you buy depends on what you plan to use it for. Since we are using it for a natural Pest Control agent we will look at the Food grade application!!!