Fluval "U" Replacement Foam Filter; Available in 4 sizes

Key Features:

• Available for the following Fluval Underwater filters: Fluval U1 Foam (single), Fluval U2 Foam (2pk), Fluval U3 Foam (2pk), Fluval U4 Foam (2pk).
• Captures large particles and debris for effective mechanical filtration
• Custom-made to fit perfectly inside the filter chamber to prevent debris bypass
• Has a pore size that allows efficient water flow, less clogging and long-lasting filtration
• Suitable for freshwater, marine or reptile environments