¹éÓÂÒà¡çºÃÑ¡ÉÒËÑÇÇÑ´ PH ORP HI70300L Electrode Storage Solution 1 x 500 mL bottle To minimize clogging and ensure fast response time, always keep the glass bulb and the junction of your pH electrode moist. Store the electrode with a few drops of HI 70300 storage or pH 7 buffer solution in the protective cap. Description Electrode Storage Solution Bottle 500 mL