Here are some questions that I'd like to know and I think others will want to ask:
1) where did you obtain the background? It looks both attractive and sturdy.
2) was it difficult to get background to sit where it is? Are you using a silicon adhesive along the bottom and sides? Is it also attached to the back of the tank?
3) it looks easy to access the bio ball chamber from above. Do you agree?
4) do you have any other filtration / pumps in the tank to move water to the inlet portion of the background?
5) what problems if any did you encounter as you were first using this?
6) if we have fish that will jump or crawl over spaces, could we do the following: a) put the outlet through the wall, not over it and b) place a removable covering over the top between the chambers and the light fixture (like a flat piece of acrylic above the wool? (see one of you pictures.)
Well, you said we could ask!
Again, this is quite enlightening. You have 100% removed the problem of water leaking or spilling from the tank, significantly reduced electricity cost for moving water and heating chilled water from a wet/dry, and completely hidden the filtering portion of the aquarium.