Fluval Bio FX 2L

Deep pore structure with interconnected micro-tunnels offers vast surface area for billions of beneficial nitrifying bacteria to establish and thrive Linked cavities permit free and even water flow, discourage blockages and prolong contact time for superior and effective biological filtration For best results, rinse monthly using aquarium water and replace partially every 6 months Allows for the establishment of a high concentration of nitrifying bacteria to reduce ammonia and nitrite quickly and efficiently for a healthier aquarium For optimal filtration, place in the last stage of the filtration process