4 x Compatible Foam and 4 x Compatible Polycarbon Carbon Cartridges to Fit Fluval U2 Internal

4 x Compatible Foam and 4 x Compatible Polycarbon Carbon Filter Cartridges to fit Fluval U2 Internal Filter

170g Compatible Biomax For Fluval U2 U3 U4 Internal Filters Ceramic Filter Media

4 x Compatible Foam and 4 x Compatible Polycarbon Carbon Filter Cartridges to fit Fluval U3 Internal Filter