Koller Products Repti-Clean Submersible Filter for Low Water Reptile & Amphibian Habitats Internal filter ideal for low-water applications; works in as little as 2 inches of water Great for hermit crabs, crayfish, fish, turtles and small amphibious creatures Triple filter media (carbon, zeolite, and charcoal) to remove odors, ammonia, heavy metals, and other harmful chemicals Flow rate of 45 gallons per hour (GPH) Designed to work with the Koller-Craft Repitat mangrove habitats (models TM1215 and TM1227; sold separately)