White Dicalite Swimming Pool Filter Media Powder Enhances filter productivity reducing and use Capable of filtering out particles as small as one micron Provides a sparkling pool day or night, add this after cleaning the filter to make your pools sparkle.It is designed to simplify your pool maintenance process and allow you more time to enjoy your swimming pool. Features. Filters out particles associated with recreational water illness. Enhances filter productivity reducing and use. Made from microscopic, fossilized , DicaLite, also known as diatomaceous earth (DE) is a powder that acts as millions of tiny sponges, absorbing and trapping particles that contaminate and cloud your water. Capable of filtering out particles as small as one micron, diatomaceous earth filters are the most efficient and effective pool filters available Dimension(s): 1" high x 1" wide. Weight: 25 lb bag