12/13/2020
Different Types of Chlorine Sanitizers for Swimming Pools
As you may already know, chlorine is the most popular swimming pool sanitizer, but there are a host of other sanitation methods currently in the industry that you can also use to keep your swimming pool clean. We will discuss in this article different types of pool chlorine and explain why it is so popular and effective for sanitizing your swimming pool water. Six (6) different types of chlorine, or chlorine compounds, are used in the sanitation of swimming pool water. Sanitizers come in liquid, powder, and tablet form, and many pool owners often have questions about the differences between them. These sanitizers are sodium hypochlorite, calcium hypochlorite, lithium hypochlorite, chlorine gas, and stabilized compounds trichlor and dichlor. In this article, we hope to get some of the questions you may have answered and learn more about these different forms of chlorine.
The World Health Organization has published international guidelines for the safety of swimming pools and similar recreational-water environments, including standards for minimizing microbial and chemical hazards. The United States Centers for Disease Control and Prevention also provides information on pool sanitation and water related illnesses for health professionals and the public. The main organizations providing certifications for pool and spa operators and technicians are the National Swimming Pool Foundation and Association of Pool & Spa Professionals. The certifications are accepted by many state and local health departments.
Chlorine is added to the water to kill germs. But it does not work right away. If used properly, free chlorine* can kill most germs within a few minutes. CDC recommends pH 7.2–7.8 and a free chlorine concentration of at least 1 ppm in pools and at least 3 ppm in hot tubs/spas.
If using cyanuric acid, a chlorine stabilizer, or chlorine products with cyanuric acid (for example, products commonly known as dichlor or trichlor [see product label]), CDC recommends pH 7.2–7.8 and a free available chlorine concentration of at least 2 ppm in pools. CDC recommends not using cyanuric acid or chlorine products with cyanuric acid in hot tubs/spas.