I currently am setting up a 40 breeder. I can't decide between the two. I do know I want colorful fish. I have a filter her that can handle a heavy load so I'd like to have a decent amount of fish. I know what I'd have with mbuna but not peacock. Please let me know which and how to stock a peacock tank. Also, I don't plan on breeding so I've read all male peacocks might work.