It is possible to construct your own tank using pre-cut glass and gluing it with an aquarium silicone sealer. It is important that all tanks have a close-fitting lid. As most tarantulas are from tropical climates, you will find that some form of heating will be required at some time. A minimum temperature of 68degF should be maintained, although, as a general rule, a temperature of 70degF to 75degF should be aimed for. The majority of centrally-heated houses are warm enough for most of the year, but a heating system should be installed during the winter.
Underground heating is another alternative.
These methods have the advantage that they supply a uniform source of heat from the base of the tank and set up a simple water cycle, the water evaporating then condenses on the sides of the tank. Burrowing tarantulas are also able to construct underground chambers that have a warm humid environment within. The humidity in the tank is also very important and a humidity gauge should be included as part of the basis equipment. The majority of tarantulas die during moulting, as a result of the humidity being too low. Do not be fooled by book illustrations of tarantulas in desert environments, if you try to keep yours in a similar environment it will die.