I do not have the HI70300 storage solution. What else could I use?

You can use your pH 4 buffer. Just place a few drops of that inside the cap to keep the electrode moist

You can use your pH 4 buffer. Just place a few drops of that inside the cap to keep the electrode moist read more »
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I do not have the HI70300 storage solution. What else could I use?

You can use your pH 4 buffer. Just place a few drops of that inside the cap to keep the electrode moist

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