We just recently got a CWD and we were mislead by the pet store employee. Water Dragons are arboreal, not aquatic! I would like to add branches and rocks to his enclosure. Is there any wood I can / can't use in his terrarium? Is it better to use plastic to prevent contamination and mold? My original plan was to grab some branches from the back yard but I wanted to ensure it wouldn't hurt the little guy. Rocks too, can I wash any old rock, similar to how you wash substrate, and add it to the enclosure?