Biocarrier Type Helix zak a 25 liter Ø 17 mm Zwart
This is a biofilter medium for aquatic applications, suitable for moving water and trickle installations. It has a diameter of 17 mm, height of 15 mm, and an area of 720 m²/m³.
- The description claims very high biological filtration due to the high protected surface area.
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