So I have young RETF and once he starts growing I want to get a larger terriaum and tank mate once I move him to a different terriaum I would like to get a new amphibian or reptile to move in to this terriaum 12x12x18.. So are there any that can live their entire life in a terriaum this size? I was thinking about a reed frog because I read somewhere that you can house a couple of blue back reed frogs or start night reed frogs in this size terrarium.