Hi I got a baby Briearus a couple of months so small that I had to put him in a large critter container. Anyway his mantle is now about 2 inches so I tried leaving the top off overnight but he stayed in pvc tee in container that he uses as den. Should I leave top off or gently remove tee and put it in tank. I would like to let him keep that as his home so I know where he is. Lol because he is still small plus he is comfortable. Thanks for your help. Tom