The Marina 360 and Marina Splash Replacement Filter Cartridges are a must - have for aquarium enthusiasts. Each cartridge is equipped with carbon and zeolite, which work together to enhance water clarity and color. They effectively eliminate pollutants and unpleasant odors, creating a healthier environment for your aquatic friends. These cartridges are specifically designed to be used with the Marina 360 Aquarium and the Marina Splash Aquarium. They come in a convenient 4 - pack. To maintain optimal water quality, it's recommended to replace 1 cartridge every 2 - 4 weeks. With these filter cartridges, you can ensure a clean and clear aquarium all year round.

Using these Marina 360 and Marina Splash replacement filter cartridges is easy. First, make sure your aquarium is turned off. Then, remove the old filter cartridge from your Marina 360 or Marina Splash aquarium. Simply insert the new cartridge in its place. To keep your aquarium water in top - notch condition, replace one cartridge every 2 - 4 weeks. This will help maintain clean and clear water. Also, always store the extra cartridges in a cool, dry place. If you notice any issues with water clarity or odor, check the cartridge to see if it needs to be replaced sooner.