Dive into crystal clear water each and every time you swim with the superior strength and effectiveness of Diatomaceous Earth swimming pool filter powder. This High-Grade DE filter powder can filter down to 3-5 Microns in size and leaves water sparkling and crystal clear without clumping. This DE powder is porous, all-natural and created from the fossilized exoskeletons of plants known as diatoms. It delivers an astounding level of filtration and ensures efficiency so your filter will always operate at its peak level. This value-priced DE powder not only leaves water shimmering and sparkling with clean, pure beauty, but it will also reduce the amount of time you spend maintaining your pool and save you money on pool supplies. Recommended Amounts: 4 pounds for Above-Ground DE Filters and 8 pounds for In-Ground DE Filters.