I recently converted my empty 72g bowfront into a Shark Tooth Display Tank. Since I sell Sharks' Teeth and love sharks, I decided this would be pretty cool. The base of the tank is 50 pounds of Estes Black Reef Sand. Then for the center peice, I got a 3 1/2 foot long Silky Shark at Myrtle Beach, SC. It is a real shark that was gutted out and stuffed with sawdust. When I bought it I made sure it was a net catch instead of it being caught just to kill it to make the shark. Then I have 4 bowls that hold some of the teeth I have in stock. I have 4 more bowls on order that should be in sometime soon.