Specifically designed for the Fluval U3 filter, the U3 Bio-Foam Pad captures large particles and debris for effective mechanical filtration.
 Part# A487  
Mechanical filter media
Fits perfectly inside the filter chamber to prevent debris from escaping
Ideal pore size allows efficient water flow, less clogging and long-lasting filtration
Suitable for freshwater, saltwater or reptile environments
Convenient 2-pack format