The biOrb fish tank is one of the most popular aquariums throughout the world.  Over a million have been sold in the last few years alone.   Since the original biorb was created eight more Biorb aquariums have been created, including the Baby Biorb, Biube & Biorb Life Aquariums.  The Biorb Aquariums vary in size from four to sixteen gallons and can be used with both fresh and saltwater.  Biorb tanks are great for small desks or larger setups and are easy to clean and take care of for new fish keepers or experienced aquarists.