Product Features:
• Filtering media for DE pool filters.
• For above ground and in-ground DE filter
  system.
• DE can filter down to 3-5 microns.
• Diatomaceous earth consists of fossilized
  remains of diatoms, a type of hard-shelled
  algae..
How to use:
• Used everytime you backwash your DE 
  filter and will keep your filter working at peak
  performance 
• After backwashing, add 1lb./10sqft filter area.
  pools.