1. Sturdy Magic Bag Bracket: The magic bag bracket is made of sturdy materials, which stably supports the magic bag, ensuring that the magic bag remains in the correct position during the filtration process. The water flow can evenly pass through the magic bag for filtration, extending the service life of the magic bag. 2. Multi - layer Filtration Structure: The filter cotton, magic carpet, magic bag and biochemical cotton form a multi - layer filtration structure, which progresses layer by layer to purify the water quality step by step. The filter cotton intercepts large particles first, the magic carpet further filters tiny impurities, the magic bag adsorbs impurities, and the biochemical cotton performs biological purification. 3. Significant Water Quality Improvement: Through this multi - medium and multi - level filtration combination, the water quality of the fish tank can be significantly improved, removing dirt, impurities, ammonia nitrogen and other harmful substances in the water, and creating a healthy and comfortable living space for fish.