Most probably if its not too old you may use it as you use the dry powder. but if its slurry like then discarding it and purchase a new one is desirable. Generally for bacteriological,isolations we use nutrient rich media so some water content do not create much problem as far as component changes color to darker shades.

Thanks Mr. Patel for your opinion. I continued with the same and hopefully got Ralstonia colonies very well. Thank you.