Using Whisper filtration technology, the ReptoFilter provides quality three-stage filtration, removing debris, discoloration, and odors and ammonia from terrariums with up to 55 gallons of water. Filters at 125 gallons per hour. Uses large ReptoFilter cartridges. The design allows for operation in shallow-water environments, making it ideal for creating waterfalls. A top lid keeps reptiles out of the filter chamber while providing easy access for replacing filter cartridges.