Diatomaceous earth powder is an all-natural, porous powder derived from the tiny fossilized exoskeletons of algae-like water plants known as diatoms. When used in DE filter systems, diatomaceous earth powder provides a remarkable filtration media, trapping debris and contaminant particles ranging from leaves and dirt to bacteria and other micro-organisms. Splash DE powder is of the highest quality and will provide you with outstanding filtration results that will leave your pool water sparkling clean. Fresh diatomaceous earth powder is required every time you backwash your DE filter and will keep your filter working at peak performance. Diatomaceous earth powder provides truly superior filtration so you can enjoy shimmering, clear water.