what if a person used an undertank heater for a plastic box like rubbermaid or sterilite that is home to a snake. would the plastic box release poisonous fumes or would the heater not affect the plastic? also, what are some recommendations for not putting the heater directly onto the box. i've heard that some people put the heater on a ceramic tile, and put the tile under the plastic box. thanks
Yes you can. But I recommend taking a length of heat tape or heat cable attached to a thermostat. That's what people use in their racks, and it is just as effective, and doesn't stick.