BiOrb Standard Service Kit G4012A
This is the kit you need to replace your filter cartridge and maintain your biOrb. The filter cartridge in your biOrb should be changed every 4-8 weeks*. A new cartridge is supplied in the Service Kit as well as a special cleaning pad for removing dirt and algae from the inside surface of the biOrb and water preparation chemicals for carrying out a partial water change. The kit also contains easy to follow step by step instructions.