I have a small one in a 29G tank doing very well. The plan is to move it to the 72G tank some day. It went through a 30 day quarantine with no ill effect treated with coppersafe. This species of tang is often decribed as the most difficult bristletooth tang to take care of. This my second attemt at this species. The previous fish had a significant tail wound and small mouth wound at purchase and died after a month in the 29G display even though it seemed to be doing okay. This brings up a significant point. Really, look over this fish before buying one. Besides the usual criteria for a healthy fish, focus on the mouth. Many specimens have mouth damage from capture which can significantly decrease the chance of long term survival. That applys to all bristletooth tangs. When possible, capture the fish without a net to avoid damaging their delicatre mouths. I have been told they prefer higher alkalinities but I don't know how true that is.
Anyway, the second fish has been going strong for at least three to four months after quarantine. He's been kept to this point in the smaller tank because it is a longer established tank with lush microalage growth. He is a bit of a pig and his belly stays full between feeds from the algae in the tank.
Lastly, in trying to secure a healthy specimen, make sure its the right species. There is a LFS that was selling a bunch for just $40. I usually see them for $50 to $80. It turned out it was really a related species. There are several species with similar coloration. Even the small tomini tangs should have adult coloration. When I informed the owner of the mistake, he kept selling them under the false label.