HM Digital
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2018/12/05
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HM Digital's PH-200 and PH-80 (as well as other brands of pH meters) require this storage solution. Sensors must be kept in this solution. If dry, refill the pH meter cap with the PH-STOR storage solution, rewetting the sponge lightly. The PH-STOR solution will keep your pH electrode working as intended so you can focus on your grow.