Wayyy too many triggers in the tank.
The only trigger that is good in smaller tanks are te niger and one other one i cant remember the name of right now. A lot of triggers need a big tank so they can establish a territiory and have enough swimming space. Some like the clown trigger establish a very large territory and any other smaller fish or trigger that goes into it will be attacked.
Not only is aggression a factor, but the bioload and potential size of each fish.
I'm tired of getting pointless messages. If your going to start a conversation or ask me something, keep up with it.