The Hanna HI-70300M Storage Solution, available in a 230 mL bottle, is an essential maintenance tool designed to optimize the longevity and performance of pH and ORP electrodes. Crafted with high-quality, reagent-grade chemicals, this solution is ideal for storing electrodes when not in use. It prevents the sensor tip and reference junction from drying out, reducing bacterial growth, and maintaining the hydration necessary for accurate measurements. The solution comes in an air-tight bottle with a tamper-proof seal to ensure its quality and freshness, each marked with a batch number and an expiry date for tracking. It's important to avoid storing electrodes in distilled or deionized water, as this can shorten their lifespan. Hanna also offers specialized storage solutions for different types of electrodes, including those for sodium ISE and calcium ISE, ensuring that each electrode type receives the most suitable care.