How many Blue German Rams (Mikrogeophagus ramirezi) should I get for my planted 200L tank? I'm thinking 2 pairs - will there be enough space? Tank mates will be Ottos, various shrimp and a school of rummy nose and false neon tetras. Also, I've little knowledge of Apistogramma but is there a variety I should consider instead that looks as good and has as much personality? Do Rams, Apisto's and other SA chiclids get on together? Could I also keep them with some checkerboards, for example?