Ecological and safety-conscious production of a low chloride, highly concentrated and long-term stabilized disinfection solution for use in professional pool water treatment as well as drinking water disinfection to maintain and safeguard the quality of the hygiene parameters (TVO - German drinking water regulations, § 11 UBA - German Federal Environment Office). The freshly produced electrolysis product is taken from the product storage tank as required, and added to the water to be treated by means of a separate measuring, control and dosing station that is independent of the electrolysis system.