I can see it now.....darn mouse finds something to nibble on and then gets washed away in a flood. said:
heehee - serve the bugger right!
I was thinking you could have LR (and corals) on the top shelf, and leave the deep part as is, and just let the fish swim. It would look like those under-water movies, when they are filming along the reef wall, and all the fish swimming alongside.
Neat idea, but the lighting would be a problem - either burn what's on the shelf, or the bottom of the deep side is dark?