I would have added another trigger or two. Always works best to add a couple then weed out until you have a workable situation. i had a blueline, titan, clown, and queen. Needless to say there were a couple fallen weaker triggers in that mix.
Some triggers get along with others, some don't. The clown is definitely 1 that doesn't except for rare circumstances. I'd keep an eye on them but more than likely, you're gonna end up separating them very soon. Even the babies are vicious but their personalities are pretty much like puffers. I had 1 that would always come to the front for food and when I opened the lid, it would spit water like an archer fish. My friend got spot in the face a couple times. It was hilarious!