Keep the electrode of your pH meter wet with this solution between uses for the longest electrode life. 230 ml bottle.
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pH meter storage solution
After a couple of weeks of storage in the solution to protect the electrodes I noticed crystals forming in the bottom of the container. I understand the need to keep the electrodes wet to prevent contaminates from building up around them. I dumped the solution and replaced it with bottled water. I'll see how that works.