Biocarrier Type Helix zak a 50 liter Ø 17 mm Zwart
This is a biofilter medium for aquatic or moving water applications, suitable for trickle installations. It has a diameter of 17 mm, height of 15 mm, and an area of 720 m²/m³ with a protected surface of 589 m²/m³.
- The description claims very high biological filtration compared to other bio-rings.
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