I've had my bifa with a smaller flowerhorn and a paraneetroplus gibbiceps in a 55 gallon for over six months now. They get along pretty well. Every now and then, my bifa will chase the flowerhorn around for a bit, but nothing serious. He likes to show him who's boss... I'm planning on upgrading to at least a 125 gallon soon since they're all growing pretty quick.
[h=2][/h]