Optimized biofilter medium with perfect volume utilization, large intervals between cleaning and performance. The SUBSTRATpro is made of sintered glass. The spherical shape provides high volumetric density, allowing the entire volume to be used in the filter (filter baskets or modules).

The optimal surface of the spheres ensures intense colonization by the important cleaning bacteria. Due to the large number of bacteria, nitrite loads are more easily reduced, and the intervals for maintaining the filter material are longer.

The EHEIM SUBSTRATpro is suitable for freshwater and marine aquariums, washes easily, and can be reused.