I'm trying to figure this out. My Nautilus DE filter pressure keeps going up after several hours (5 hours). I've changed the DE grids to new. I've noticed by taking the filter apart that the Air Strainer on top usually gets very clogged with debris (pine needles, bugs, ****, etc) Also the strainer is pressed down flat versus round shape. I bought a new strainer and the same thing happened where it becomes clogged after a few hours and the pressure goes from 18psi (normal) to 30-35psi (high). If I backwash the pressure goes down for a few hours only to go back up after about 5 hours. Because the air strainer is pressed flat, debris gets stuck in it easily. Anybody else experience this?
The pool is relatively clean, no algae, dirt. theres alot of trees nearby and leaves and needles must be getting trapped. I've installed pool socks and mesh net but somehow debris keeps getting on the air strainer. The DE filter grids look very good. Why would this strainer get clogged, why does it clog so quickly even with skimmer socks and why won't backwashing cure the problem?
Any help would be appreciated.