Actually, I do like the concept....however, I would not use the Iwaki as a suction, rather, I would put the pump in a "push" configuration as pulling is bad for a pump not designed for it. The stack/inline linking of filters that hold massive amounts of media is definitely in the cool category! A point of reference as to the potential, my 2250 holds 18L of Eheim Sub Pro...granted, that is with the mechanical and filter floss removed and using a pre filter...but the potential is clear:. Massive bio capacities.