He's not all that interested with other sharks. In fact, he has a couple nurse sharks and some bamboo sharks right now and he's not so into them. He is willing to give them back to our LFS if he needs to take them out of the tank...
I'm not sure on the exact dimensions, but it's pretty big. It was actually the display tank from one of the local Malls down here in Miami, which he bought after the mall needed to make space for additional vendors - so you can only guess the size. I is a rectangle shape...and I would say it's probably about 8-10 feet long (but I could be WAY off on that)...and then maybe 4 x 4 on width and height.