What to get next?

[Cracken]

We are in the hobby to do research and compatibilty checks before we go and buy an addition to our tanks. Really I don't see it being the fishes fault for having aggressive traits as we all know what the general guidelines and which species will mesh with others. My humble suggestion would be to do some reading and research on what you have and what kind of fish u want to have. Maybe u need to sell/trade the fish u have to get the ones you want so they can all have peaceful tank mates. Eels escaping to the fishes needs maybe an idea too. I have a dottyback and it is great in my aquarium but I also made the landscaping with his needs in mind. IMHO.