Yes there is a lot to learn. I am still learning myself. It looks like you have some mbuna cichlids. These guys can be nasty. I went the route of mixing peacocks and haps. Mine are all male and I have one of each species. Another thing I learned, is to overstock them to deal with aggression. The peacocks are more peaceful than the mbuna. I started a thread called "my fish journal" in the picture section if you want to check it out. I am also able to add some other species that I couldn't with mbuna. I wish I knew more about mbuna cichlids to help more.