After use, air massage bathtubs may retain a small amount of moisture in the pipes, air bubble nozzles, and bottom. If left undrained for a long time, especially if there's a trace of accumulated water inside the air ducts, it can become a breeding ground for mold. This type of mold is often black or green.

Swim spa tub is suitable for: ·Fitness trainers (such as swimmers) ·Arthritis or postoperative rehabilitation patients ·People who need to control weight or enhance cardiopulmonary function Massage tub is suitable for: ·Urban white-collar workers with high work pressure and need to relax ·Patients with chronic fatigue or sleep disorders ·Family members who love bathing culture