Biological filter media

sera siporax mini Professional was developed especially for smaller aquariums up to a volume of approximately 100 liters. It allows maximum increase of the settling surface for purification bacteria but has a compact shape at the same time.

Cirax is a biological filter medium which creates the perfect colonisation conditions for useful bacteria, due to its large, highly porous surface.

Due to its particularly porous form, Siporax not only works in the aerobic area but also in the anaerobic area. Thus, nitrate is also degraded. Since it is made of sintered glass, no substances are released to the aquarium water. 15 mm in size.