From the Fluval range. Premium biological filter media for high performance use with smaller filters such as power filters & canister filters (07 series). Features: Deep pore structure: The abudant, continuously rough & porous structure with deep interconnected micro-tunnels offers a vast surface area for billions of beneficial nitrifying bacteria to easily establish themselves & thrive. Superior efficiency: The three-dimensional linked cavities permit water to flow freely & evenly through the bio-fx nodes, discouraging blockages while prolonging contact time for superior & effective biological filtration. Promotes an active nitrogen cycle: Allows for establishment of a high concentration of nitrifying bacteria to reduce ammonia & nitrite quickly & efficiently for a healthy aquarium. Size: 1.2 cm x 1.5 cm. 2 ltr total.
