The Marina Slim Filter Zeolite Plus Ceramic Cartridge is a game - changer for maintaining a healthy aquarium. By ingeniously combining Zeolite and Ceramitek in a single cartridge, it offers a comprehensive filtration solution. Zeolite acts like a powerful sponge, efficiently adsorbing toxic ammonia. This not only keeps the water clean but also significantly reduces stress on your fish, allowing them to thrive. Meanwhile, Ceramitek, a highly porous ceramic biological filter medium, takes biological filtration to the next level, ensuring that harmful substances are broken down effectively. This 3 - pack of easy - to - use disposable cartridges is designed for convenience. It fits perfectly into the Marina S10, S15, and S20 Slim Filters. For best results, replace one cartridge every two weeks. Avoid replacing all cartridges simultaneously to maintain a stable population of beneficial bacteria. This cartridge is especially well - suited for goldfish aquariums, where water quality is crucial for the well - being of the fish.




Using this Marina filter cartridge is a breeze. First, make sure your aquarium has the Marina S10, S15, or S20 Slim Filter as these cartridges are specifically designed to fit them. Insert the cartridge into the filter according to the filter's instructions. It's a good idea to replace one cartridge every two weeks. But remember, don't change all the cartridges at once. This is because you need to keep the beneficial bacteria in your aquarium alive and working. These bacteria help to break down harmful substances in the water. As for maintenance, keep an eye on the water quality in your aquarium. If you notice the water getting cloudy or your fish seem stressed, it might be time to check the cartridge. Also, store the extra cartridges in a cool, dry place to keep them in good condition. This way, you can ensure a healthy and clean environment for your fish, especially if you have goldfish in your aquarium.