Because of its unique design, the Exo Terra Natural Waterfall can be installed anywhere in the terrarium. Its natural appearance integrates in any type of terrarium. It stimulates natural drinking behavior in lizards, and increases humidity levels. The Natural Waterfall is made from hard, non-porous and non-toxic resin which prevents the development of harmful bacteria. Water circulation is provided by the Exo Terra Repti Flo 200 Pump (included). The waterfall consists of several parts to facilitate easy cleaning. For safety reasons, the walls of the collection tank are rough in order to allow reptiles and amphibians to climb out easily, thus avoiding any danger of drowning. As an additional safety measure, for smaller chameleons and frogs, small stones or gravel may be added to the collection tank. Organic waste should be removed from the collection tank at regular intervals to keep the water clean. CUL Listed pump.