Hi guys first i would like to say i'm new here and this is my first post. i've got a chinese water dragon about 6 months old living in a 55 gallon tank. i'm currently building an enclosure 5' x 2.5' x 3'. I'm not sure what to do for a background. I'm on somewhat of a tight budget. i have seen the great stuff foam backgrounds and thought about doing it but it would take forever with the size of this enclosure. Are there any sheets or any materials that are safe for animals? i have done some research and didn't find much except for the great stuff foam. any help is appreciated!