Key Features All You Need Service Kit Includes Filter Cartridge, Cleaning Pad, 5ml Water Conditioner, 5ml Biological Booster Fits all BiOrb and BiUbe Aquariums Makes Aquarium Maintenance and Servicing Easy Change Every 6 to 8 Weeks Oase BiOrb Service Kits, all you could need for a regular filter change in your BiOrb or BiUbe tanks. The filter cartridge in your BiOrb should be changed on a regular basis. It is recommended to do this every 6 -8 weeks. The BiOrb Service Kit contains a single replacement filter cartridge in its holder, a cleaning pad, 5ml of Water Conditioner and 5m of Biological Booster. All you could need to perform those changes with ease.