The biological filter mat is made from high-quality materials that aid in the development of nitrifying bacteria, with thick threads and a coarse texture, making it ideal as a medium filter material. Healthy koi fish need clean water! Therefore, both mechanical and biological filtration are essential to achieve a natural balance in a koi pond. Biological filtration removes toxic ammonia and nitrites through bacteria. The denser filter media provides a large specific surface area for bacteria to adhere to, while allowing sufficient water flow through the filter without clogging.

• Good water resistance
• Light resistant
• Excellent water and air permeability
• Flame resistant
• Washable, recyclable multiple times
• Durable

Size: 200×100×3.8 cm