A 10- to 20-gallon aquarium houses one or two leopard geckos from hatchling to adult size. Larger tanks tend to cause the geckos to stray away from their proper heat and hide box. Any cage you choose should be at least 1 foot tall. Be sure to have a secure screen top on your gecko cage that will support a light fixture, provide good ventilation and keep out bothersome cats. A hide box filled with moist moss or vermiculite is needed, so your leopard gecko can shed its skin properly. Live or artificial plants can be added for a nice decorative touch.
The best way to heat your leopard gecko is by using an undertank heating pad or tape. Heating one end of the cage is best. This allows for a temperature variation that your lizard needs. Heat rocks tend to become too hot for leopard geckos and should be avoided due to the risk of burns. For viewing, a simple low-wattage light can be placed overhead on the screen-cage top and left on 12 hours a day. Because leopard geckos are active at night (notice their vertical pupils), they do not need to bask under a special UVB light.
The ideal temperature in the hide box is 88 to 90 degrees Fahrenheit at all times. The ambient air temperature of the room they are housed in should be above 73 degrees.
Leopard geckos like low humidity in their tank and should only be misted lightly once to twice a week.