Cichlids are champion jumpers. Since the length is 48" I would stock it like a 90G. Think in terms of 4 species with 1m:4f for mixed gender with the OB's the only peacock. For all male I like 12 in a 48" tank but you could go a little higher with the extra width. For a max guideline I like 18 males that mature less than or equal to six inches in a 72" tank.