Aquascape BioFalls and Skimmers Aluminum Screw Set - 15 per bag
Auascape BioBalls provide a textured surface area (19 sq. inches per BioBall) for beneficial bacteria to colonize and grow. Aquascape BioBalls are the ideal filtration media for use in all biological filtration. Each box contains 100 balls nd fits perfectly in the Aquascape MicroFalls Filter.