Im debating on selling my Oscars and making my 55 a cichlid tank.... I have a young Jack Dempsey in a 29.. He is only about 2 inches... if that... What size tank will he be needing when he is full grown?? If I end up selling my Oscars, I want to make the 55 a cichlid tank... how many fish could I get in there? And what should I put in?? Like I said, I have a 39 with a baby female convict and the "mystery cichlid" (Blue peacock maybe?) I like the aggressive fish... lol so....