Hi sock and
to TR.
This could be a cool tank! Off the top of my head, lighting could be a problem. It is generally accepted that 1 bulb will cover a 2'x2' area so you will have an extra 6". Maybe you could mount the lights higher to create a bigger footprint but it is such a deep tank that it will be hard to get light all the way to the bottom if you are going to have corals. I think that you would have to be conscientious of oxygen exchange. And, you will need to think about how you will keep the glass clean.
