Diatomaceous Earth, or D.E., is an efficient and long-lasting filter powder. D.E. particles act as tiny sieve, removing debris and filtering out the smallest particles. This is a white filter powder for all standard diatomaceous earth swimming pool filters. Includes easy-to-use quantity chart. This package has been especially designed for your convenience. It is strong, moisture resistant, easy to handle, and easy to store. It contains 24 lb. of efficient, long-lasting D.E. Filter powder. Just measure out the correct amount, pout and enjoy cleaner, clearer pool water. Includes four 6-Pound charges.