Diatomaceous earth (DE) is essential for anyone looking for natural remedies in their home, yard, garden or homestead. This amazing product is made of tiny, fossilized diatoms (plankton) that accumulated over millennia in fresh water lakes. When mined and left untreated, this fine powder can be used in hundreds of different ways. At 10 pounds, it's easy to transport yet big enough for large projects making it our most popular size.