1. Purify water quality. The internal fish feces isolation chamber is designed to isolate and store fish feces (equivalent to dry-wet separation) to isolate impurities and purify water quality. 2. Reduce the pollution of a large number of impurities and assist in the cultivation of nitrifying bacteria. Long-term use can make the water quality of the fish tank clear and solve the problem of turbid water. 3. Separate fish feces. Equipped with a funnel-type fish feces separator designed according to the principles of centrifugal force and buoyancy, most of the fish feces are separated from the water. 4. Filter and divert most of the fish feces, reduce the burden on the fish tank filter, and solve the problem of frequent cleaning of the filter cotton. 5. Automatically inhale fish feces, accelerate the water circulation of the fish tank through its own full-flow generation function, automatically suck away the fish at the bottom of the fish tank, keep the fish tank clean, save time, effort and water. 6. Silent flow generation, using a submersible pump as the power, with strong suction, low noise, and auxiliary flow generation and oxygenation functions.