Eheim BioMech A breakthrough in technology, EHEIM bioMECH is both a very effective Biological and Mechanical filter media. Key Benefits: 400sqm / litre The highest rating biological and mechanical filter media today! pH Neutral, suitable for both fresh and marine setups Washable and reusable Made in Germany Size Guide: 1 L Mechanical-biological filter medium for combined water treatment bioMECH has been cleverly designed: dirt-trapping pockets capture and retain large and small dirt particles. At the same time the subtely designed pore structure provides colonisation for the purification bacteria and thus ensures reliable biological decomposition. The material is pH-neutral and does not contain water hardeners. EHEIM bioMECH is suitable for fresh and marine water, is washable and reusable many times over.Specially designed filter medium for simultaneous mechanical and biological water purificationThe material is pH-neutral and without water hardenersReusable (wash out carefully, in order not to destroy the bacteria cultures)Suitable for fresh and marine water