Just came into a 55 with a wood stand. I am going with a Central/South American theme. Ok so I want to do either 1 of two options Stock wise. Just full out GBR only tank or 1-2 larger cichlids. The problem is I don't know which species I could have in a 55. The filtration would depend on which I go with. So what I would like to know is which species could I have. with your experience knowledge of you wonderful people on here. opinions are appreciated. Thx.