haha personally, i've been using these sponges that i found at the dollar store. they're meant to be facial pads or something to scrub your body with. i use it both as a prefilter and inside my HOB as well. its shaped like an oval so i cut it in the middle and slip the intake in the cut and then tie it with thread or rubber band it. (if you google facial scrub sponge its the first image, they come in a pack of two and last pretty long)
Last edited by inthepacific; 01-16-2013 at 03:44 AM.