The Aqua one 102c ceramic cartridge provides a home to essential nitrifying bacteria in your aquarium, which helps to keep bad bacteria at bay. It’s essential to the overall well being of your aquarium livestock and should be replaced every 16 weeks. If your aquarium is also fitted with a 1c Carbon and Wool cartridge, it’s best to replace this every 4 to 6 weeks, however the two cartridges shouldn’t really be changed at the same time.
