D.E. is a porous powder, that looks like little sponges when magnified. Which explain why DE filters are so popular, they are designed to absorb all the stuff in the water.
Clear water passes through, but particles as small as 2-5 microns become trapped. When the internal elements of the Pro-Grid and other DE filters become caked with the DE, they strain dirt, algae, and dust from your pool water.
To clean your Pro-Grid, simply backwash, or regenerate and drain the clogged DE to the waste line. The filter is low maintenance, and dependable.
For more information, contact the pros at PoguePoolSpa.com.