Tang School ideas

[rainbody]

Looking for some advice on keeping a school of same type tangs or mixed typed tangs. I had a school of 4 yellows and a clown tang for over 2 years before the school got broken up. Is there anyone running some good combos or schools that can offer some advice on how to match them up?

its 180g tank with custom cermic rockwork

[yukonblizzard]

I have a trio of Purple Tang in my frag tank and get along great. If they start to fight I can speperate them to other tanks.