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Product Description
White intensive bio-filter rings for biological water clarifying. Suitable for freshwater & marine aquaria. Providing more effective surface for bacteria which breakdown pollutants.
Product Features:
- High-quality sintered glass rings for intensive biological water clarifying.
- Internal hole diameter only 5 mm, resulting in thicker wall depth and providing more effective surface for bacteria which breakdown pollutants.
- 1 liter has 1200 sqm effective surface, 5 times as much as conventional clay tubes.