The Bio-Foam Filtrante Pack Fluval Series 06 and 07 for 6 months contains biological foam of three kinds of bio-foot fluval, offering all the quality, effectiveness and convenience that is expected of a leader in the filtration of aquariums such as Fluval. The package is compatible with the external Fluval Filters Series 06 and 07, and gets the filter to work in the highest performance for 6 months.