I know they're technically not the big guys, like you're all talking about. I have a 48 Gallon tank, and I have four of them. I have no aggression problems, or anything of the sort. Does anyone know why I'm not supposed to have that many? My tank is full of live plants, and plenty of Hiding spaces with driftwood, and a few caves. They also share it with a pair of Keyholes, a glass catfish, three scissortails, a king male betta, a honey gourami, a pleco, and two banjo cats. (whom are smaller than them). I have three females, and a male.