HY-GEN pH Electrode Storage Always keep pH electrodes stored in HY-GEN� pH Electrode Storage solution. HY-GEN� pH Electrode Storage solution is the same formula scientists use in laboratories to store glass pH electrodes. pH Electrode Storage solution maximises electrode performance and extends electrode life. pH Electrodes should never be stored dry. Buffers or distilled water are not suitable for storage of pH electrodes. Distilled water will cause ions to leach out of the glass bulb and render your electrode useless.