Title is exactly what it says. I finally managed to get ahold of a tank for my single RBP who's sadly been stuck in a 29 gallon since he was a couple inches. He was a rescue from a 5 gallon and a 29 is all I had at the time. I'd like to add some more RBPs to the new tank, however the LFS around here doesn't stock Piranha his size, so I would have to purchase Juveniles. Could I add them in with him in the new tank, or should I keep them in the 29 for them to grow out a few inches before adding?