I made a filter tray out of leftover plexiglass and drilled holes in it so I can use replaceable filter pads I can get from work in the tray. My main tank drain will empty into the tray and it sits about an inch above the waterline for that skimmer compartment. The main reason I went with this idea is because I really don't feel like spending money on filter socks and plus, I can get filter floss from work. What do you think?