Absorbs tannins and phenols. Prevents the tank and the water from becoming cloudy. Prevents the water from becoming cloudy, maintains the pH level of the water, like cleaning. Made of ultra-absorbent activated carbon, the solid composition removes dust and impurities, and does not cause black spots. Say goodbye to the problem of constantly changing cloudy aquarium water. Filters and absorbs any dirt or chemicals that may be harmful to the health of pet fish. The adsorbed material is tightly controlled and oxidized for filtration efficiency while extending the life of the bucket, significantly reducing the mortality rate of aquarium pets. Instead, the level increases in the process due to the cleaner water. A dirty aquarium is harmful to the life of your pet. Maintain the cleanliness of your pet's habitat using this aquatic purifier bucket. Easy to use, simply place it in the tank.