You can mix all the tangs mentioned above depending on when, how and size are thought out. I had a 265 with a purple, yellow, black tang, sailfin, powder blue and white cheek(gold rim) for almost 12 years. the powder blue was added last and was the smallest when added, around 2"s. The black tang was around 10"s. the Purple, yellow and sailfin were added at the same time and first all between 3-4"s. Then the black, The white cheek was around 5"s when added and was added with 2 angels at the same time. Powder blue was last added by itself an nothing ever bothered it. Maybe I got lucky or that formula works. Whitecheeks can become aggresive like the powderblues so be careful with those guys.