Diatomaceous earth, referred to simply as DE, is a natural sedimentary rock composed of fossilized remains of microscopic algae called diatoms. It has a powdery texture and is rich in silica. Diatomaceous earth is commonly used as an insecticide, filter agent, and abrasive substance. It can absorb moisture and is often found in household products and gardening applications.
DE is inexpensive and available commercially in two versions: 1) for pool filters and 2) labeled as “food grade” for human health and pest control. This post applies to Food Grade diatomaceous earth. To make use of what follows, make sure your DE purchase is clearly labeled as food grade….