Water/6.0 Spray a mixture of the "Pluronic" R grade and water onto the tetrasodium pyrophosphate (alone or mixed with the other anhydrous inorganic salts) while continually mixing, whereby hydration and simultaneous absorption of the surfactant occur. Add the hydrated sodium motasilicate to the hydrated phosphates, still mixing. Add the chlorinated cyanurate to the mixture and continue mixing until homogenized and a dry, freeflowing, granular product is obtained. Chlorine-containing compounds which may also be used in this process include trisodium phosphate (chlorinated), trichlorocyanuric acid, salts of dichlorocyanuric acid, dichlorodimethylhydantoin (Halane) and other organic chlorine-active compounds. Maximum chlorine stability is obtained when the Pluronic surfactant, diluted with water is completely absorbed by the phosphate mixture. Step 1 avoids temperature control problems and eliminates the need for an aging period. Hy