Part 1 ~ Heat Sources
When deciding how to heat your reptile (if it should need it, a few species can do without), avoid heat rocks. Heat rocks are not a suitable heat source for any species - as they get so hot that snakes in particular will end up curled around the rock for too long trying to warm up and will end up severely burning their belly.
Instead, use a heat lamp or bulb, or a heat mat. When using any of these, they must be regulated by thermostats - by themselves they get very hot and can burn your reptile, and in the case of heat mats under vivs, cause damage to the viv and whatever the viv is standing on. Even small, low wattage mats can burn through the bottom of a viv when they get hot enough (as the heat just continues to build up from the moment you plug it into the mains).
Note : Heat mats NEVER come with a built in regulator, so if the guy in the petshop tells you that you don’t need a thermostat because the heatmat will regulate itself, he is mistaken. Also, try not to buy the cheapest one there as you’ll get what you pay for. And check that the thermostat you have bought can handle a high enough wattage that it can control your heat mat or bulb.
There are also different types of thermostats - on/off or non-proportional thermostats and pulse or proportional thermostats. If you have a mat, you need a non-proportional thermostat, which will turn off the mat when it reaches the programmed temperature. If you have a bulb (including ceramic bulbs, which creates infra-red heat but no light) you need a proportional thermostats, as it adjusts the amount of electricity that the bulb gets.
When setting up your heat source you need to make sure that by providing heat you don’t provide your reptile with an escape route! You can put heat mats inside a vivarium, or underneath (though the probe of the thermostat must always be inside the vivarium or close to the heat mat in order to get an accurate reading of how hot it gets). When setting up bulbs (or ceramics), use a bulb guard (to prevent your reptile from coming into direct contact with the bulb), and make sure it is secure and your pet can’t get into it.
Note : accidents do happen, and sometimes thermostats malfunction - this is life and can’t be avoided. But you can check the hot spot often (with a infra-red heat gun, or a reptile thermometer with a probe - not with a stick on dial or heat scale sticker as they only give you the ambient temperature) for peace of mind.
Heat mats will malfunction or become heat-blocked if they have a lot of weight pressed on top of them (from a large vivarium on top of the heat mat, or a large and heavy snake lying directly on the heat mat). They will also stop working/malfunction if bent, or the copper conducts in the heat mat break.
Bulbs will malfunction if turned on and off frequently and if the wrong wattage is used for the fittings and the thermostat.


