For best results, Ammonia-X cartridges should be replaced every two to four weeks. They slip easily onto undergravel lift tubes with no need to disturb set-up.Temporary cloudiness may occur due to the fine particles found in high quality zeolites. This can be easily avoided by rinsing cartridge under tap water before placing in filter.
Penn Plax Ammonia-X Ammonia-Removing Undergravel Filter Cartridge 2-pack
Pack Size: Pack of 2
