Biological sintered glass rings for pollutant breakdown.

Main Features:
• Biological degradation of pollutants in freshwater and saltwater aquariums: Sintered biological glass rings for use in tanks.
• Easy to use: Insert the biological filter rings as the penultimate filtration stage.
• Intensive water clarification thanks to biological filtration: Microorganisms settle inside the filter material and break down pollutants.
• Highly effective: Conical pores and 5 mm wall thickness create an ideal surface area of 1200 m_/l for beneficial microorganisms to settle.