The goal of every pool and spa owner is to have sparkling, clean water. Unfortunately, a variety of undesirable substances will often enter a pool or spa. Such items can make the water unhealthy. There are bacteria on every person’s body that can get into water; some forms can cause infections or rashes. User perspiration and urine break down to undesirable nitrogen compounds and “Mother Nature” can also contribute: rain, algae spores, leaves and other organic materials. All of these necessitate the use of a sanitizer, such as chlorine. The total ideal range of free chlorine in swimming pools is 1-3 ppm. Spa owners should keep in mind that the ideal free chlorine range in spas (hot tubs) is between 2 and 4 ppm.
