New World has a bunch of these little guys and they're pretty cool. Not too expensive either ($20 if I remember correctly.) They have a whole bunch of them in a couple of tanks: does anyone know if one can have 2 in one tank without any problems?
Mine's a 33 cube. They had a bunch of them in one tank, so I'm assuming the agression was diluted. (I saw no fighting among them.) But if there were 2 or 3 in a 33 cube?