In regards to fixing the accurite thermometer / hygrometer to the inside of the tank. 3M make a 'clipping' version similar to velcro. It's very strong, and won't injure the snake should it come 'undone' for any reason (ive never had this issue)

http://www.target.com/p/3m-command-d...t/-/A-13713731

readily available from walmart and such where you get your accurite thermometer / hygrometer