Fluval C3 Bio-Screen - 3-Pack
The Fluval C3 Bio-Screen Replacement Media provides massive biological surface area for friendly bacteria to colonize. It also works to block debris and evenly distribute the water flow before it drips into the Power Filter's biological trickle chamber. The Fluval C3 Bio Screen Replacement Media is exclusively designed for the Fluval C3 Power Filter and will work to keep your aquariums crystal clear.