Specifically designed for the Fluval U4 filter, the U4 Bio-Foam Pad captures large particles and debris for effective mechanical filtration. 

Features: 

• 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

Compatibility: 

• U4 Underwater Filter

Item #: A488