Finest-Filters 4 x Compatible Foam and 4 x Compatible PolyMax ClearMax Phosphate Nitrate Filter Cartridges and 170g Compatible Biomax to fit Fluval U2 Internal Filter

Compatible Fluval U2 PolyMax Filter Cartridges Phosphate Nitrate Foam Fish Tank Aquarium FilterYou are purchasing Finest Filters Compatible PolyMax / ClearMax filter cartridges and plain foams suitable for the Fluval U2 aquarium filter.Replacement PolyMax compatible filter cartridges for Fluvals U2 series of internal filters. These help control green water and unsightly algae growth by adsorbing and trapping phosphate, nitrite and nitrate. It effectively produces crystal clear water, reduces odours, and creates ideal conditions for fish and plants. The polymax / clearmax filter cartridge helps reduce overall aquarium maintenance. These cartridges should be replaced approximately every 4 weeks, each pack contains 4 cartridges, 4 foams and 1 bag of compatible biomax media. Sold in 3 different sizes for the U2, U3 and U4 filters.Beige Foam Size (mm): 127 x 57 x 13.