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Bio-Filter medium with high biological effect.
After the mechanical start of the water with Eheim Mech, the water is filtered over one or more layers of Eheim Substrate. Eheim Substrate is a high-quality porous quartz filter medium. The surface structure is ideal for the attachment of cleaning bacteria. The adhesive surface is 450 m2 per litre. As a result, the water is biologically filtered. Eheim Substrate is washable and can be used several times.
Content Eheim Substrate: 1 L, 2 L, 5 L