Tetrafauna Decorative ReptoFilter Rock for Frogs, Newts & TurtlesThe Tetrafauna Decorative ReptoFilter for Frogs, Newts & Turtles provides effective filtration for your tank and adds visual appeal at the same time. The rock like structure hides a powerful filter that works in any aquarium up to 55 gallons. This three stage Whisper filtration system helps keep the water crystal clear using medium ReptoFilter cartridges. Organic debris is trapped in the mesh covering of the cartridge, while the activated carbon