Ill check the book out. Also Corn snakes do need a heat source. There cold blooded like all snakes, they do have a higher tollerance than other snakes though. 75-80* cool side, 85-90* hot side. I was gonna do a heat emitter on a timer with the probe attached to a flat rock and let it kick on and off at 88*.

The only problem im gonna find with this live substrate setup is gonna be the drainage. Naturally water soaks into the soil for the plants and the excess needs someplace to go. The drain for excess water is the gravel under the soil. But over time water will fill up the gravel and reach the roots of the plants causing root rot if not completely drained out. The question is how long would it take to do so? Grass seems to use alot of moisture in the ground so it might not be a really big issue. Time will tell though. Im going to get started on this project this weekend i hope. The fogger creates a nice fine watery fog in the cage and hangs on the bottom which will keep the grass moist but i just have to becarefull not to be over moist. Its gonna be a fun project.