PISCES Modern Bullet-shaped Glass Aquarium, 5 Gallons Aquatops Pisces All-in-One Series of Nano Glass Aquariums offer a variety of sleek, modern designs. The PCS-5GB has a bullet-shaped glass design with seamless curved corners. Each unit includes an innovative and unique multi-stage internal filter box system which comes complete with a submersible pump and an easy-change drop-in filter cartridge filled with premium activated carbon. In addition to the Mechanical and Chemical filtration, the Pisces Nano Aquariums also includes a drop-in Bio-plate and ceramic rings for superb Biological Filtration. All models include a super bright touch-sensitive LED Light complete with a moonlight setting, and a tank lid with mounting clips. These space-saving desktop aquariums are perfect for fresh or saltwater set-ups.