I have an empty 12x12x18 exoterra and have no idea what I can house comfortably in it. I'm hoping some of the veterans can help the newbie. I would like to try a live set up but after the last time I tried it and ended up with gnats (that I still can't get rid of in all the other cages...grrrr) I am not sure if I want to attempt it again. So...any ideas? I'm not super creative when it comes to this so I'll take any and all suggestions. Thanks!