Hey, just wanted to share a picture of my rack system for various types of terrestrial geckos. It is located in my closet. The closet is kept at about 80 F during the day via a small space heater w/thermostat. The rack itself is heated with heat rope. I had to drill holes in each "runner" for the trays in order to pass the heat rope under without it catching on the tray when it is pulled out. The rope turned out to be the perfect length too. It's so nice when things go as planned! This type of rack would not work for small snakes as they would escape through a small gap that surrounds the top of each bin, but for terrestrial geckos and probably even frogs, it's perfect. I plan to add at least another rack of the same kind in the near future.