Finest-Filters 12 x Compatible Foam and 12 x Compatible PolyMax ClearMax Phosphate Nitrate Remover Filter Cartridges and 3 x 170g Compatible Biomax to fit Fluval U4 Internal Filter

Compatible Fluval U4 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 U4 aquarium filter.Replacement PolyMax compatible filter cartridges for Fluval U4 series internal filters. These help control green water and unsightly algae growth by adsorbing and trapping phosphate, nitrite, and nitrate.Effectively produces crystal clear water, reduces odours, and creates ideal conditions for fish and plants. The PolyMax / ClearMax filter cartridge also helps reduce overall aquarium maintenance.These cartridges should be replaced approximately every 4 weeks.Each pack contains:12 compatible PolyMax / ClearMax cartridges12 foams3 x 170g compatible BioMax mediaSuitable for the Fluval U4 filter.Size: 235 x 62 x 16 mm.