mine was too small to go in with the big boys, so he stay solo for 7 months, grew up to 6 or 7 inches, now he's too mean for the big boys, lol. So, he's in with three 4 inch piranha's. I know it sounds crazy, but he totally dominates them, he just chases them around the tank, never leaving them alone. They're shaking in their metaphoric boots. I should make a video, to silence all those big P fans who make crappy killing videos, here's one where the cichlid wins. LOL