Exo Terra Pebble Waterfalls can be installed anywhere in the terrarium. Water circulation is provided by the Exo Terra Repti Flo pump (included). The waterfall consists of several parts to facilitate 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. Large = 255mm x 270mm x 270mm