verry cool ok so fancy guppies are out. And wife thinks the chiclids shown so far look boring.
But the basic idea is something in the ciclid family between 3 to 5 inches.
there is a few options . convicts,firemouths,rainbows,texas, jack dempseys(ebjd and bgjds included) , green terrors, salvinis , blue acaras . umm im sure theres more but those ae the only ones off the top of my head that can live in a 55 for life.
That might me a good idea. Would they potentially bread as a food sorce for my larger fish. I debated mollies tell the reality that they would eat a feeder goldfish then they will eat a molly set in.