There are three types of filters for biorb and biube aquariums.  The Biorb Service Kit, Biorb Anti Algae Kit, & Biorb First Aid Filter. 

The Biorb Service Kit is the regular biorb filter for all biorb and biube aquariums.  There is only one size of the service kit and it fits the baby biorb, 8 gallon biorb, 16 gallon biorb, biube, biube pure, and all sizes of the biorb life aquariums.

The No Algae Filter helps to eliminate green algae from aquariums that are exposed to too much light and should only be used for seven days.  And the First Aid Filter helps to combat most common fish illnesses and should also be used for seven days and then replaced with the regular service kit filter.