Excuse me, how to reduce the power of air pump when there is resistance to fish farming?

Well, it's probably not easy to control. It uses the principle of alternating current to convert electric energy into magnetic energy, and then drives the magnetic lever to move. It vibrates at a frequency of 50HZ per second, compressing the airflow generated by the rubber box. It looks continuous. You can buy a small one directly in the market. At present, air pumps are designed to be very user-friendly. There are two levels: high power and low power. You can raise it when you need it, and lower it when you need it. The small one is 65438.