Description: Fluval U3 Internal Filter Replacement Foam Sponge 2 Pack U3 FOAM PAD Fluval U3 Foam Pad captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. It is custom-made to fit perfectly inside the filter chamber to prevent debris bypass. The foam pad has a pore size that allows efficient water flow, less clogging and long-lasting filtration. Suitable for freshwater, marine or reptile environments. KEY FEATURES 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 TECH SPECS Item # : A487 UPC : 015561104876 For Fluval U3 Underwater Filter Suitable for freshwater, marine or reptile environments What's INCLUDED 2 x foam pads