So I'm going to purchase a 135 gallon tank today and I'm looking for some south american cichlid stocking advice. Currently I have 6 inch Oscar, 4 Inch green texas hybrid, 3 inch Cuban and I think a 3inch Tri mac. I'm thinking of keeping the Cuban and wondering what I should add with him/her. I'm interested in Wolf Cichlids, Gobies, Wild Oscars. What would you suggest?