Can I keep my Leachianus in an Exo terra cage? Exo terra aquariums or any screen-topped enclosure does not hold humidity well. There is a strip under the doors specifically to allow cross ventilation, which allows dry air in and allows any moisture to evaporate out the top. This is a problem that is almost impossible to rectify with daily spraying. Some advanced hobbyists may spray three times a day, and they are able to keep proper humidity in these cages for these types of