TetraFauna® ReptoFilter® for frogs newts and turtle terrariums is the only terrarium filter you’ll need. With efficient three-stage filtration TetraFauna ReptoFilter promotes clean clear water in as little as 2 inches of water making it ideal for the low-level aquatic environments small aquatic animals prefer. This small filter is easy to conceal behind a plant or other decorative object and its lid keeps reptiles out. It removes debris discoloration odors and ammonia from terrariums.