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Standard bio-filter medium with large colonisation area for bacteria cultures and high efficiency SUBSTRAT can be layered in one or more layers.
It is a highly porous filter material made from sintered glass.
The surface structure offers the important purification bacteria excellent colonisation conditions.
The colonisable area amounts to 450 m² per litre.
EHEIM SUBSTRAT is suitable for fresh and marine water, is washable and can be reused.