Abstract: The invention discloses a management arrangement for a swimming pool. The arrangement includes a number of sensors being adapted to measure variables and generate input data relating to a swimming pool. The input data is processed by a processing unit to generate output data, which data is then used by an actuator to control equipment. Various operating parameters are programmable into the processing unit via an operator interface. The arrangement provides a combination of ultraviolet treatment and ion enrichment in order to disinfect or purify the water. The arrangement specifically regulates the ionization of the swimming pool water so as to substantially maintain a pre-determined ion concentration level with reduced operator intervention.