Some of you may know that I have a PB and an Arowana. The Arowana is probably 10 inches now and the bass is 8.5 inches. Recently, I purchased a baby 4 inch rtc from my LFS. I have kept him in a 20 gallon for now because when I got him, I was a bit nervous about the bass eating him(not so concerned about the Arowana. He’s friendly) How risky would it be to put the rtc with the PB and the Arowana? Right now, all the rtc does is sit on the bottom of the tank. He hardly moves but does eat. I know it’s usual for them to do that but I have had him for 2 weeks now and he hardly ever moves. Is it normal?