Disinfectant chlorinated cyanurate containing compositions and method of use

A method of disinfecting sodium chloride brine solutions held in a brine storage tank which is in fluid connection with an ion exchange column containing ion exchange resins for water softening, said brine being used to regenerate said ion exchange resins and the disinfecting of said brine thereby avoiding bacterial contamination of said resins, comprising adding to water in said brine storage tank a pelletized mixture of sodium chloride and a bactericidally effective amount of a chlorinated cyanurate selected from the group consisting of potassium dichloroisocyanurate and sodium dichloroisocyanurate, and dissolving said pelletized mixture in said water to provide both the chlorinated cyanurate to avoid bacterial contamination of the brine and the sodium chloride to form the brine solution for regeneration of said ion exchange resins.