A functioning filter is not only crucial for the water quality of the aquarium, it also ensures the survival of the inhabitants. In conjunction with a regular partial water change, it keeps the aquarium's ecosystem in balance, generates flow, absorbs substances that cause turbidity and enriches the water with oxygen. The waste from the aquarium inhabitants is decomposed to harmless compounds by the bacteria that settle in the filter substrate. Only regular replacement of the filter foams (depending on fish stock) assures the continuous capacity of your filter system. Model: BioMaster