The Repti Clear Terrarium Filter is an optimal water filtration system with large filter volume and effective flow control. Three filter cartridges guarantee optimal mechanical, chemical and biological filtration. The 3-stage filtration system allows alternate replacement for continuous biological filter activity. The Repti Clear Terrarium Filter offers an airflow control device and water flow adjuster. The filter is supplied with two spouts: a 90 degree swivel spout that directs flow output and allows changes to the flow pattern in the aquarium or terrarium, and a 180 spout to connect tubing. Key Features : 3-stage submersible multi-purpose filter Biological, chemical and mechanical filtration For terrariums and aqua-terrariums Easy to set-up & use Easy to maintain,