Hey terrarium peeps, A friend of mine gave me an exo-terra upright terrarium today. It measures 12"w x 12"d x 18.5"h. I've never had a terrarium with critters before, and was curious what might be appropriate for this size set up. Keep in mind, I don't want to go any bigger, so any suggestions should be able to stay in this for life. Any hints on hardware I'd need would be great too. Any links also appreciated... Thanks!