Its usually hit or miss. My percs hosted in whatever is available. I had a torch they hosted in then introduced a RBTA. They seemed to go back and forth between the two, so I sold my Torch and they hosted in the RBTA. Then the RBTA decided to move and dive into my seio, so the percs were left with nothing. Now they are hosting in my Giant open brain and large colony of palys. If your true perc is territorial it may scare them into the carpet. Good Luck!!