i used an exo terra 18x18x18 for my neonate. if you go this route YOU HAVE TO change out the mesh top with acrylic!!! or it will not hold humidity you need for GTP. before you even get the snake, put some of the plastic closet rod holders in the tank. i used a industiral silcon and its held for well over a year and counting. this makes it easy to put perches in the cage.