Black Biochemical Cotton (Coarse Hole) 50×50×2cm

Black Biochemical Cotton (Coarse Hole) Filter Material for Aquariums is a high-quality filtration media designed to enhance water purification through mechanical and biological filtration. Made from durable polyurethane or polyester foam with an open-cell, honeycomb-like structure, it efficiently traps debris while providing an extensive surface area for beneficial bacteria to thrive. Its coarse holes promote excellent water flow and aeration, ensuring optimal oxygen circulation for aquatic life. Safe, non-toxic, and long-lasting, this versatile filter material can be easily cut to fit various filter systems, making it suitable for both freshwater and marine aquariums.