ELECTRODE CLEANER PART A B, 2 GALLONS. 1 Gallon Part A 1 Gallon Part B Designed for hydroponic solution meters. Specially formulated for electrode reconditioning. When an instrument probe becomes contaminated it will lose accuracy and stability. Genesis Labs has designed a specialty two part cleaner to refresh probes and electrodes to assure proper performance. Use ECS Electrode Cleaning Solutions for this purpose. IMPORTANT - The cleaning process requires two solutions part A and B. Be sure to purchase both parts. Cleans and rejuvenates pH and EC sensors. Pour a small quantity of cleaning solution into a clean container adequate in size to submerge reference bulb. Immerse electrode in part A, then part B and back in part A for 5 minutes each. Rinse well. Do not reuse or recanter used solutions.