Your tank looks really great!! I have a couple of hermits who are in some god awful ugly shells, but they must like them cuz they haven't switched to any of the empty ones I threw in. Lol. You will need to put a few empty shells in there that are bigger than their current shells, though, cuz they will need to move out when they molt and outgrow current shells They're not expensive at the LFS
. Your rock looks great, nice hiding holes in there. Good luck!