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- Dec 28, 2009
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I got my Hanna Ph meter for Christmas and I have a couple questions. Do I need to calibrate it initially? It was the kit so it cam with the solutions and cleaning agents, can put the solutions in a container and lable them so that they can be re-used or are they a use once and toss type of thing. Ho often do I need to re calibrate. What do I need to gwet to check acidity in the way of other solutions.?