I worked on this for days. I saw on BRStv that they recommended splitting the tank up into 9ths and trying to create focal points that way instead of the typical triangle. I really wanted to stay away from the usual triangle/pyramid. That said, with the height of the IM40, limited width, and rock I had at my disposal, I ended up with a typical triangle. I was originally disappointed but I've come to like it. There are no shadows, it "sticks" together really well while still providing holes for swimming. I just moved over the clowns this morning and have been holding off on adding the corals. I'm trying to take it really slow as I have 2 small anemones that I'm trying to keep away from my clowns.