This package has been especially designed for your convenience. It is strong, moisture resistant, easy to handle, and easy to store. It contains 24 pounds of efficient, long-lasting D.E. filter powder. Just measure out the correct amount, pour, and enjoy cleaner, clearer pool water. Include four 6 pound charges. Use 3 pounds of D.E. per 20 square feet of filter area. Always follow your filter companies instructions. 1. Find the capacity (area of your filter equipment. (This figure usually appears on the outside of the filter housing, listed in square feet.) 2. Use 3 pounds of D.E. per 20 square feet of filter area. To extend filter cycles for pools up to 20,000 gallon capacity, add one full cup of D.E. to the filter inlet each morning and afternoon. Initially, you may experience shorter cycles as you clean unfiltered water or after heavy pool usage. Generally, this indicates the filter aid is working efficiently. Clean the filter as required and enjoy clean, clear swimming pool water.