Hassle-free for you, healthier for fish, the BiOrb has a unique filtration system that cleans the water so you don't have to. The strong, safe acrylic globe gives fish about 10 times more space than a traditional bowl. The air pump and filter are hidden in the base. Just add fish and water, then change the filter every six to eight weeks and you don't even have to empty the tank. Comes with activation guide, easy-change 5 stage filter cartridge system, ceramic filter media, air pump, LED light unit, and water preparation chemicals. Décor pieces not included. Holds 4 Gallon (11.75" diam x 12.5" high). Choose Black or Silver frame.