Many people believe that the hotter the hotter the bath, the more soothing it is, but water temperatures exceeding 104°F (40°C) actually carry clear risks. The U.S. Consumer Product Safety Commission set this temperature limit based on human physiological responses, safety standards, and long-term research.

When the water temperature in a spa jacuzzi tub drops or the water remains in the tub for too long, the salt may recrystallize. The nozzle orifice is typically small, making it easier for salt to accumulate, adhere, and clog.

SPA is more like a comprehensive system for relaxation of body and mind, and a spa jacuzzi tub is one of its hardware components. In other words: a spa jacuzzi tub is the equipment, while a SPA is the experience.

But if you are pursuing a higher quality of life experience, deeper relaxation, soothing, and enjoyment, then: ✔ A spa jacuzzi tub is undoubtedly better, more worthwhile, and more comprehensive. The value it brings is far beyond what a regular bathtub can offer.

When asked about the depth of a spa jacuzzi tub, the most common answer in the industry is around 90cm. This depth is not arbitrary, nor is it solely based on aesthetics; rather, it's a comprehensive balance of structure, safety, and ergonomics.

The bathtub water temperature is maintained between 36°C and 40°C. While this temperature is comfortable for humans, it's ideal for bacteria that thrive in warm environments. Legionella and Pseudomonas aeruginosa multiply rapidly at this temperature, and without regular water changes or disinfection, bacterial numbers can increase rapidly.