oh dude you got to get a fu-manchu is you have an all predator tank. they just top it off when making it really interesting placing your hand in..lol
ive kept triggers many times, Picasso is by far my personal fav & ive been able to match them to other species. biggest thing with triggers or any larger / tougher animal that can hold its own , is that individual temperaments govern compatibility. some will be fine, where as the same species but a submissive action displayed or an annoying constant habit of annoyance can drive a dominant trigger into a killing frenzy.

To which even if you intervene , the muscle will happen till a rival is dead. So id say make any new edditions at a time when your home all week end to observe, or get a fu-manchu
Linkme
welcome to TR by the way bud