i have a sump under my tank and i want to add finer filter pads. i work at a computer HUB station and there is tons of packing foam. i was wondering if i could add this type of foam as filter media? the foam is very tight so it would trap most undesired particles, but is the foam water friendly? here are some pics, quality sucks because its off of a cell phone but please give insight if anyone has ever done this before. thanks



