I have a dwarf orange and two blue crays. They get big so I recommend a bit of an upgrade eventually. And they seem to like stimulation.. ike plants to rip up of veggies to murder. I have mine in a 46g(or 48 can't remember) with lots of hide spaces for the pair.
here is the girl being fed. The boy was hidiing that tme http://www.youtube.com/watch?v=gHGMZ...layer_embedded