Without any disinfection, the water in any spa hot tub can become a breeding ground for microorganisms within a day. Therefore, the water quality in a spa hot tub without disinfectant begins to spiral out of control within 4 hours and becomes unsuitable for soaking within 24 hours.

Correct order: Add acid first, wait for the water to fully mix and circulate, then add chlorine. Specific steps are as follows: 1. Test water quality parameters 2. Add acid (pH adjuster) 3. Add chlorine (disinfectant) Never add acid and chlorine at the same time or in the same area!

The answer is yes. Low pH in swim spa hot tubs is not only harmful to the equipment but can also irritate human skin and eyes. When the pH of the water is below 6.8, the acidity can irritate the conjunctiva of the eyes, causing redness, tearing, and even a burning sensation.

Researchers and health experts generally believe that spa hot tubs do not directly "cure depression," but rather indirectly alleviate depression-related symptoms by promoting relaxation, improving sleep, and lowering stress hormone levels.

Chlorine is the most commonly used water treatment chemical and can kill most bacteria, viruses, and algae. Common chlorine sources in swim spa hot tubs include: • Liquid chlorine • Chlorine tablets or granules

Modern people often experience muscle stiffness, neck and shoulder pain due to prolonged sitting, lack of exercise, or excessive stress. The massage effect of the hot tub's water jets relaxes muscles and relieves lactic acid buildup, thereby reducing body tension and making the process of falling asleep more natural.