Reliably established that any bathed for 30 minutes in the pool brings the water up to 30,000 micro-organisms that breed in water, using as nutrients are available in its composition organic compounds. The number of microorganisms in the water of the pool over time increases significantly. That is why the presence of plant for disinfecting water in swimming pools is not an element of prestige, and the urgent necessity. Water disinfection should be carried out regardless of the schemes of water exchange in the pool: straight-through, recirculation, or filler. Due to the fact that microbial contamination introduced into the water basin primarily by the visitors themselves, to ensure proper health and prevent outbreaks of epidemic diseases, the water basin should be bactericidal, that is capable of destroying made bacterial contamination. This requirement is satisfied almost all the reagent methods.
However, we must take into account the peculiarities of each agent when it is used for disinfection of water in the pool. Water chlorination Due to the high efficiency of the chlorination of water for its disinfection is widespread throughout the world. Chlorine and chlorine compounds in the water long retain their activity, so that chlorinated water has antibacterial properties. But chlorine is a mass of flaws – and essential. Since chlorine is not affected at all pathogens. Some strains, as well as spores, viruses, protozoa cysts and helminth eggs remain stable to the reagent. In addition, chlorine is highly toxic. In chlorinated water are formed: chloroform, , total up to 235 toxic compounds.