A mature tank always helps with anything.
The mature Clown tang is an open water fish that only schools to mate and keeping them long term in any captive system is difficult, from my research. Michael, Fenner, Calfo, and other that are not or working for someone trying to sell you one.
PS, even the 2 Drs. list this fish as Expert only, aggressive, min. 150g and they are trying to sell you one.
SWF.com list them as Care Level: Difficult , Temperament: Bold