As a grow out tank, that size is just fine. I used a 29 gallon (with lots of rock) for coral catshark pups when I was breeding them. Putting a small / young shark into a big system can create problems making sure they are eating.
Pics of it are here:
http://www.monsterfishkeepers.com/forums/album.php?albumid=1287
Pics of it are here:
http://www.monsterfishkeepers.com/forums/album.php?albumid=1287
