Nice site, I finally closed on a short sale in Florida and the pool is a mess, frog pond (and turtles). It has a DE filter which I ran for a few minutes. The pressure went up to 30 lbs and climbing so I ran it on backwash but it still goes on up to 30 lbs pretty quick. Not familiar with the DE filters, should I put more DE in every time I backwash? What is the normal pressure rating for this type of filter? I'm still raking out all kinds of algae but want to get the filter ready for the chemicals.