Self-repair: first determine whether the pump is really broken. Check whether the plug or wire is in poor contact or short circuit, whether the socket is electrified and whether it is waterproof. Remove and inspect the pump body. Unplug the power supply first, and disassemble the nut on the right side of the pump body, dirt on the water outlet, etc. Check the inside of the pump body. Check whether the mechanical parts are damaged, such as whether the motor rotor is stuck, whether the rotor bearing is aging, and whether the pump body leaks water. If you have certain maintenance experience or skills, you can replace the damaged parts yourself. If it is necessary to replace the motor, bearing, etc. , you can buy maintenance-related parts yourself, or you can find some professional shops online to sell these parts.
Seek professional help: you can contact the after-sales service of fish shop or aquarium, or the service company that repairs water, electricity and appliances. When looking for professional services, you can refer to factors such as product quality, service reputation and price.