The substrate of a cage is the material that is on the bottom. There are appropriate and not so appropriate choices of substrate in corn snake housing. Cedar shavings are unacceptable as they cause respiratory problems in snakes.  I personally do not recommend pine for the same reason, but others have used this substrate without any problems.  Corn cob bedding (manufactured for use with birds) should not be used as a substrate because it causes excessive drying of dermal tissues and can cause serious intestinal blockage if swallowed. Acceptable substrates include reptile bark, butcher paper, paper towels and Astroturf.

Reptile bark can be purchased in pet stores, and is attractive and natural-looking. Butcher paper can be acquired in many places such as home depot or art supply stores. This substrate, while not particularly attractive, allows one to keep the cage very clean by continuously replacing the soiled paper. Paper towels have the same advantages and disadvantages of butcher paper. Astroturf can be used, but it does tend to rot easily if wetted, so it is best to have several pieces cut to fit the cage so you can rotate dirty and clean pieces.

Appropriate Heating

There are several choices for appropriate corn snake heating. Whatever choice of heating is used, it is very important to provide one area of the cage where the ambient (air) temperature is 80-85 degrees F. Corn snakes, like all reptiles, do not make their own body heat and rely on a behavioral mechanism called thermoregualtion to regulate their body temperature. Thermoregulation means that when a reptile is too cool, it moves to an area to warm itself, and when it is too hot, it moves to a cooler area. Access to warm areas are critically important to the health of your snake. Appropriate heating is required for proper digestion and the effective functioning of the immune system.

If the tank has a screen top, a shop light or metal reflector may be placed on top of the cage, to one side, with a heating bulb inside to create a basking area of 80-85 degrees F. Another method of heating is the use of quality undertank heating pads. Undertank heaters are plastic with one adhesive side. The adhesive side of the heater is used to attach it to the bottom of the outside of the tank, on one side of the cage. These heaters can only be used with certain types of cages, so check the directions before purchase. Hot rocks are not recommended for corn snake heating for several reasons.

Hot rocks provide a localized heat source that is often too hot. As a result, the snake will curl itself about the rock in an attempt to raise its body temperature, this can result in serious thermal burns. Think about this from the snake's point of view. One tiny area of the cage is 100 degrees F, and the rest of the cage is freezing. Without some type of heat, reptiles will get sick, so the animal will use whatever source of heat is provided, even if it is too hot. Some of the new hot rocks that have thermostats are a much better choice if a hot rock must be used. If not, at least burying the hot rock in some substrate will help to diffuse the heat. It is much better to provide indirect heating, or heating that the animal has no direct access to. This will prevent thermal burns from occurring.