Thank you all for your kind comments.
This tank is specially setup for the Xenos, thus the open spaces.
Somehow I still feel there are too many rocks inside. Intend to remove some rocks to create more open spaces.
BTW, I have another 4 Enantiopus melangenys & 2 Xeno ochrogenys ndole in a 2 footer at the balcony under conditioning. They will join the other Xenos in the 5 footer soon.