Ozone for spa bath is the most preferred alternative among many others. Hotel and resort swimming pools are treated with ozone by many businesses today. When chlorine reacts with urine and perspiration in water, it produces ammonia and halomethanes. Halomethanes have a high rate of cancer-causing potential. In water, halomethanes and ammonia cause irritation to the eyes and nose as well as causing bleaching of hair and other skin problems.
As a result of the chlorine reaction, halomethanes are formed as a byproduct and ammonia, the most common irritant, is reduced by the addition of ozone. Swimming in water treated with ozone is pleasant and bacteria free. Additionally, ozone also kills all the pathogens found in water, and controls the growth of algae and other bacteria. Ozone acts as a micro flocculant, which further improves the filtration of water with the flocculating agent added in. As a result, the water becomes crystal clear and less turbid.
Ozonized water is so crystal clear that it looks like a healthy, bluish-green, clear, fresh, soft, sparkling body of water.
Utilizing ozone has the advantage of being unstable, converting back to oxygen and leaving no residual toxicity. However, for pool water treatment applications, once the water has been disinfected, the water is re-disinfected after a few hours, sometimes less, depending on how often the water is changed.
Most of the time, ozone is used as a primary disinfectant in these systems, while chlorine is used as a residual disinfectant to prevent bacteria from proliferating. It is common practice to maintain residual chlorine levels of 0.5ppm at the pool water inlet and 0.2ppm at the pool water outlet regardless of the additional disinfectants used in pool water treatment. Pool water’s 0.5 ppm and 0.2 ppm levels are kept at these levels by adding ozone to the water.