Zebrasoma Tang Tank

[Michael43]

I’m not one to ask when it comes to tank size, scared for flaming, but I have all zebrasoma besides a sailfin variant. I have experienced them in most aggressive to least aggressive: purple, yellow, gem, scopes, black

 

[Erwan E]

How many tangs can I have in my Red Sea 750 (160gl)? I introduced 3 yellow and a clown tang at the same time. They are all doing well. I would rather not get another Zebrasoma type due to the 3 yellow and no more Acanthurus because they are generally very aggressive. I was thinking about powder blue. Should I get 2 so that the current tangs do gang on a single one or is it a bad idea? Suggestions please