Note: unless otherwise noted, the sponge filters do not include sponges. I didn't keep around the old dirty ones when I broke down the fish room.

8 small shrimp-style sponge filters (including 2 never-used sponges)

3 large shrimp-style sponge filters

4 double-stacked box filters (see picture - they're basically tall corner box filters)

If I hadn't been forced to break down the whole fish room, I'd still be using these. They worked very well and were only used for maybe 1.5 years. The shrimp-style sponge filters actually impressed me - they really push water, even when not fully-submerged, and have a nice fine bubble size. The box filters are great for QT because they are easily disinfected.