Michael, Just to toss in my 2 cents:
Woke up this morning like a kid on christmas morning... RAN OUTSIDE to hopefully see the bottom design on my pool... Unfortunately, it was not there : < >>My pressure had risen 8 pounds with very little flow out the return, so i backwashed for a few minutes... water came out pretty clean where I was really hoping to see every color in the rainbow flowing out of that tube.. Headed out again to coat the filter with DE and hope for the best... But check out the last four or five posts' that Ben left on my thread: http://www.poolforum.com/pf2/showthread.php?20437 ..... where he speaks of "coating" the filter...