siporax^® mini was specially designed for compact filters such as the new sera fil 60 or 120. This filter medium ensures best water quality by optimal biological purification. siporax^® mini is suitable for every compact internal biofilter, external filter, trickle filter systems in both fresh and saltwater aquariums. The filter medium is extremely economical: For example, 1 liter of sera siporax^® mini provides as much settling area for filter bacteria as 34 liters of ceramic filter material and ensures over 200 liters of crystal clear and biologically pure aquarium water.