biological filter media by EHEIM, substrate, substrate pro and LAV...
... provide clear, healthy water and stable water values. Therefore, we have invested a lot of research project in the development of biological filter media.
Never clean the whole biological filter material in a process (and never too thoroughly) or exchange.
The bacterial cultures may not be destroyed completely, otherwise the new settlement is delayed.
To the part cleaning the filter baskets are ideal in outside filters and the filter modules by the inside filters aquaball and biopower.