Hardscape! That's it lol. Thank you oh so much.
But I have no branches to put in it. I do have a question however about using wood in it. I am in the process of tearing down a planted tank. I have a rather large piece of wood in it. I have had this wood for years, it just goes from tank to tank to just sitting around. Is that usable in a vivarium? I don't know if I would use it because it is pretty big, but that would be nice to know so if I decide to make another I can use it