I'm in the process of setting up my Oceanic 178 gallon tank and am going over a possible stock list in my head. Before I discovered this wonderful website, I posted on another forum a possible stocklist which involved a sailfin tang. A few members of the other site said they would be too large when fully grown for the 178. The footprint of the tank is 5'Lx2'Wx30"H. Will I be ok with the sailfin? Other possible tankmates are a miniatus grouper, harlequin tusk and a Duboulay's Angelfish. Let me know if the tang will be too large, and if the other fish are compatible. Thanks in advance.