Fluval® C4 Bio-Screen Pad provides massive biological surface area for friendly bacteria to colonize, plus it blocks debris and evenly distributes water flow before it drips into the Power Filter’s biological trickle chamber. Exclusively designed for the Fluval® C4 Power Filter. 3-pack.
Other sizes available:
-14020 Fluval® C2 Bio-Screen Pad, for the Fluval® C2 Power Filter -14021 Fluval® C3 Bio-Screen Pad, for the Fluval® C3 Power Filter