I've had a very successful 60 gallon Peacock tank for about year with around 10 fish. I've recently purchased a 200 gallon tank(7'x2'x2'), and I'm considering stocking it full of Mbuna. With the size of the tank, how many fish should I be able to put in there? Are there any particular species I should avoid keeping together? I'm hoping the space to get away from one another should minimize issues that come with most Mbuna tanks.