Diatomaceous Earth (DE) is the remains of microscopic one-celled plant(phytoplankton) called diatoms that lived in the oceans and lakes that once covered the western part of the US and other parts of the world. Known worldwide for its extremely pure quality, our "Food Grade" Diatomaceous Earth (DE) is an eco-friendly naturally organic material from the purest fresh water source. Diatomaceous Earth is the fossilized remains of microscopic shells created by one-celled plants called Diatoms. Not all deposits of diatomaceous earth or the diatoms present in those deposits are the same. The shape of the diatom must be tubular with holes on the walls. It is important to have a consistent shape diatom without any unwanted sediment and it must be fresh water because the diatoms form a harder shell and is less fragile than those in salt water.