Fluval U4 Poly/Clearmax Cartridge (2 Pack)

Fluval PolyMax Filter Cartridges provide powerful chemical filtration, helping to remove phosphate, nitrite and nitrate from aquarium water to support a cleaner, healthier aquatic environment. Specially designed to adsorb and trap unwanted nutrients, these cartridges help reduce green water, limit algae growth, and improve overall aquarium water quality for clearer viewing. Effective filtration media works continuously to remove impurities and dissolved waste, producing crystal clear aquarium water while helping to reduce unpleasant odours in freshwater fish tanks. Creates optimal water conditions for tropical fish, coldwater fish and live aquarium plants by reducing harmful compounds and supporting a balanced aquarium ecosystem. Designed for use with Fluval U4 Internal Filters, each pack contains 2 replacement filter cartridges. For best filtration performance, replace every 4 weeks as part of your regular aquarium maintenance routine.