I know, it just doesn't make sense but what the heck do I know?! lol I was trying to get a feel for what Jeff was considering---IDK, those measurements just don't make sense although it really doesn't matter (it was just bugging me). I think something to consider though is that you probably have to aquascape up quite a bit versus across, and that can be tricky. I had this problem with my 65g. tall. It takes great effort to get some rock up high so the top 1/2 of the tank isn't just empty. A lot of this started because he needed more space on the substrate for a large bubble coral. Now I'm wondering if this size tank will help that particular situation. IDK.