You can get something similar that I posted on another thread from Home Depot, this blue pad that is a cut-to-fit air filter. It's NOT paper. I've used it for about a week, no problems (yes, I did just find it). A 36"X18"X1" pad of this stuff is $7 and is about the consistency of a scotch-brite pad. Would make a good algae/glass cleaner, too. Easy to cut.