What components make up the filter of the Xiaomi Smart Pet Fountain 2?

The filter of the Xiaomi Smart Pet Fountain 2 is designed with multiple layers to ensure the highest water quality for your pets. It consists of microporous PP cotton that effectively filters out hair and debris, ensuring clean water. Activated carbon granules are included to remove residual chlorine and unpleasant odors, making the water more appealing to your pets. Additionally, the filter features ion exchange resin, which purifies calcium and magnesium ions, helping to prevent scaling and improve taste. Antibacterial cotton is also incorporated to inhibit the growth of harmful bacteria like E. coli, Staphylococcus aureus, and Candida albicans.
Note: 

If the filter has not been soaked in water before use, it can produce black particles, which are from the activated carbon.