High frequency use (daily or every other day): It is recommended to change the water every 3~5 days; Medium frequency use (2~3 times a week): It is recommended to change it every 7~10 days; Low frequency use (1~2 times a month): It is best to drain the water immediately after each use of the hydromassage jacuzzi tub.

·37°C~38°C: close to body temperature, relatively mild, generally recommended not to exceed 30 minutes; ·39°C~40°C: hotter, with a strong soothing and relaxing effect, it is recommended to control within 20 minutes; ·Above 41°C: higher risk, heart rate may increase, skin overheating reaction, not recommended to exceed 10-15 minutes

People who are suitable for using spa massage bathtub include: 1. Office workers who are in sub-health status for a long time 2. Middle-aged and elderly people 3. People who recover after exercise 4. People with mild sleep disorders or nervous tension 5. People with mild circulatory disorders (under the guidance of a doctor) People who are not suitable for using spa massage bathtubs include: 1. Patients with severe cardiovascular diseases 2. Patients with acute inflammation or infection 3. People in early pregnancy or high-risk pregnancy 4. Patients with malignant tumors 5. Patients with diabetic foot and open wounds 6. Patients with epilepsy, history of syncope, and severe mental illness