Designed especially for the Fluval Nano Filter, this carbon cartridge is a game - changer for your aquarium. It is filled with highly porous activated carbon that works like a charm to eliminate unpleasant odors, clear water discolorations, and get rid of impurities. Key features include: a perfect fit inside the Fluval Nano Filter, acting as a top - notch chemical filter media. With its large surface area, it efficiently captures heavy metals, organic contaminants, and pollutants. The custom - designed cartridges are super easy to load into the filtration chamber. And it comes in a convenient 2 - pack format, giving you great value for your money.

Using this Fluval Nano Carbon Cartridge is a breeze. First, turn off your Fluval Nano Filter. Open the filtration chamber and remove the old cartridge if there is one. Then, simply insert the new carbon cartridge into the chamber. Make sure it fits snugly. After that, close the chamber and turn the filter back on. As for maintenance, check the cartridge regularly. If the water starts to smell bad again or looks discolored, it might be time to replace the cartridge. Usually, it's a good idea to change it every 2 - 4 weeks, depending on your aquarium's size and the number of fish. Also, keep the cartridges in a dry place when not in use to maintain their effectiveness.