11 Water treatment units for releasing chemicals into recirculating water systems, cooling tower water systems, and other water systems, namely, chemical sterilization units and electrolytic bromine units; water treatment equipment in the nature of electronically operated bromine dispensers for use in recirculating water systems, cooling tower water systems, and other aquatic environments requiring sanitation; water treatment equipment in the nature of chlorine and bromine dispensers for use in recirculating water systems, cooling tower water systems, and other aquatic environments requiring sanitation; water treatment equipment in the nature of electrolytic brominators comprising a power supply, electrolytic cell, and bromine sensor recirculating water systems, cooling tower water systems, and other aquatic environments requiring sanitation; water treatment equipment, namely, bromine dispensers