Ammonia Remover Pads designed for Fluval's FX4, FX5 &FX6 external aquarium filters, offering efficient mechanical and chemical filtration. Harmful ammonia is absorbed by the pads, reducing ammonia spikes in new and heavily stocked aquariums. For best results, replace every month or as required after water testing. Suitable for use in both freshwater and saltwater aquariums. Pack of 3.
