Fluval Foam Filter Block, Replacement Filter Media for Fluval 404, 405, 406 and 407 Aquarium Filters, 2-Pack, A226

Fluval Foam Filter Block, Replacement Filter Media for Fluval 404, 405, 406 and 407 Aquarium Filters, 2-Pack, A226

• Fluval Foam Filter Block provides effective mechanical filtration by trapping large particles and debris
• Biological activity will eventually occur in pore structure
• Filter media helps create crystal clear, sparkling aquarium water for healthier aquarium environment
• Replacement media for the Fluval 404, 405, 406 and 407 Aquarium Filters
• Includes two Fluval Foam Filter Blocks

Fluval Aquarium Filter Foam Blocks provide mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack. Although the primary purpose of Fluval Foam is mechanical filtration, biological activity will eventually occur within its pore structure. These Fluval Aquarium Filter Foam Blocks also enhance biological filtration and are suitable for the Fluval 404 and Fluval 405 Aquarium Filters.