• Biological Filter Media

    The main task of biological filter media is to offer the best colonisation conditions for the bacteria cultures, so that after a short time a bacteria lawn develops. The bacteria feed on dirt particles of all kind and convert substances critical for the aquarium. After the first cleaning process by the mechanical filter media (e.g. EHEIM MECH or MECHpro) the biological filtration is the most important. It provides for clear, healthy water and stabile water values. That’s why we have invested a lot of research work into the development of biological filter media.

  • EHEIM SUBSTRATpro 250ml
  • EHEIM SUBSTRATpro 250ml

Filter Media

EHEIM SUBSTRATpro

EHEIM SUBSTRATpro

Optimised bio-filter medium with perfect volume usage, long intervals between cleaning and top decomposition performance.


SUBSTRATpro consists of pearl-shaped sintered glass. The spherical shape gives a high bulk density. Thus the whole of the volume in the filter (filter baskets or modules) can be utilised. Also the optimum surface of the beads provides intensive colonisation of the important purification bacteria.
Due to the high number of bacteria, peak nitrite loads are more easily reduced and the maintenance intervals of the filter material are longer.
EHEIM SUBSTRATpro is suitable for fresh and marine water, is washable and can be reused.

  • Optimised bio-filter medium made from sintered glass
  • High bulk density due to spherical shape (beads)
  • Very dense colonisation of bacteria
  • Longer intervals between cleaning
  • Better reduction of nitrite loads
  • Reusable (rinse carefully to clean)
  • Suitable for fresh and marine water

Tip:
Never clean or change all the filter media together in one operation (and never clean too rigorously). The bacteria cultures must not be completely destroyed, otherwise re-colonisation will be retarded. The filter baskets in the external filters and filter modules in the internal filters aquaball and         biopower are ideal for partial cleaning.

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