My parents have a 180 gallon salt water tank

It takes up an entire wall of their home. They have Nemo, and Dory...and boy, that fish is just as dumb as in the movie. Now I know why they made the character of Dory that way

Anyway, Valerie, I have loads of experience with fish. I have had many tanks, different kinds, and worked at two different pet stores as well. I can tell you that those Cochlids are extremely territorial. In fact, I have a cichlid right now in my tank, and nothing else. Why? He killed them all. My Mom has the same situation with one of her fresh water tanks, and it is a different cichlid. Once they get their territory, if you add new fishies, chances are, they will not survive, unless you change all the scenery to make them think they are in a new tank and need to mark a new territory. Unless you got cichlids that are not aggresive, but it was my understanding that they all were. I didn't want to tell you this, but I wanted you to at least know that they can be very aggressive. Of course, that doesn't mean that they will be

Oh, and they usually get pretty big as well. If you have any questions, please feel free to ask me. Sinc eyou introduced all fish at the same time, you should be fine. Just wanted to give you a heads up for when you add more. Make sure you ask the people at the fish store what you can add, and if there is anything you need to do before adding a new fishy.
Goofyjas, that tank is amazing!