Penn-Plax Cascade 170 Aquarium Internal Filters, Terrariums

The Penn-Plax Cascade 170 Internal Filters are designed to provide better filtration and aeration above and below the surface. Fully submersible, this aquarium filter provides physical, chemical and biological filtration for fish tanks and terrariums up to 10 gal.. The activated carbon cartridge removes harmful chemicals, toxins, odors, and other contaminants from your aquarium's water. Also included is an internal sponge that optimizes colonization of beneficial anaerobic bacteria. Great for aquariums and terrariums, these filters give you crystal clear water in your freshwater and saltwater environments.