Electrode Storage Solution used to store pH/ORP electrodes. REED R1420 Offers This Electrode Storage Solution is manufactured utilizing reagent grade materials. pH electrodes should be kept moist and not be allowed to dry out when not in use. Placing the electrode in a small glass, filled with the storage solution or by replenishing the solution in the electrode's protective cap is a convenient way to store the electrode. This Electrode Storage Solution can also be used to rehydrate an electrode after a cleaning procedure by soaking the electrode for at least one hour before beginning to take measurements. Features Manufactured specifically for pH and ORP electrodes Specially formulated to minimize microbial growth 16.9 fl oz (500ml) bottle with childproof cap Included REED R1420 Electrode Storage Solution