Fluval U4 Filter Clearmax Cartridge

The Fluval Poly-Carb Filter Cartridge combines fine polyester filtration media and activated carbon to remove debris, impurities and dissolved contaminants, helping to maintain a healthier aquarium environment. The polyester layer traps fine particles and waste, while the activated carbon helps remove discolouration, toxins and unwanted odours, leaving your aquarium water crystal clear and fresh. Advanced chemical filtration media helps absorb harmful dissolved substances from the water, improving water quality and creating safer conditions for tropical, freshwater and marine fish. Designed specifically for Fluval U3 Internal Filters, these replacement cartridges fit perfectly for optimal filtration performance. Each pack contains 2 replacement cartridges. Helps reduce overall aquarium maintenance by continuously removing waste and contaminants. For best results, replace every 4 weeks. Note: Activated carbon may remove fish medications and treatments, so cartridges should be removed during aquarium treatment periods.