What Is Diatomaceous Earth?
What Is Diatomaceous Earth? Diatomaceous earth (DE), also known as diatomite , is a naturally occurring, soft sedimentary rock that can be ground into a fine, off-white powder. It’s composed predominantly of silica —about 80–90% , with smaller amounts of alumina (2–4%) and iron oxide (0.5–2%) ( Amazon , Wikipedia ). DE originates from the fossilized remains of diatoms , which are single-celled aquatic algae ( Wikipedia ). Looking to try DE for yourself? Get yours now on Amazon — a small commission may be earned by me, at no extra cost to you. The two main commercially available forms are: Food‑grade DE : Low in crystalline silica (<1%), deemed safe for gardens, livestock feed, and household use ( Amazon . Filter (pool)‑grade DE : Heat-treated (calcined) to enhance filtration, often with high crystalline silica content (upwards of 60%), and not safe for pest control or ingestion ( Wikipedia ). DE functions as a mechanical insecticide . Its microscopic, sharp particle...