Blocs de mousse Bio-Foam pour filtre submersible U4 / Paquet de 2

The Fluval U4 foam block removes large particles for effective mechanical filtration, which is crucial for the filtration process. It fits perfectly in the filter chamber to prevent debris from passing through.

• The description claims that the foam block removes large particles for effective mechanical filtration.
• The description claims that the foam block prevents debris from passing through when fitted correctly.