As I continue to rehabilitate my crappy reef, I hit upon an idea that never occurred to me before. I stuck a hunk of bonded filterpad in the trough overflow right before the screen while I was stirring up some of the incredible amounts of detritus in the reef, and cleaning stuff in the tank. It gets clogged within only a half hour or so, and then can be tossed, much easier than a filter sock and nothing stays in the water stream for very long