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Indo pH 4.0 & 7.0 Plus Electrode Storage Solution Calibration Buffer Kit (500mL / 16 oz of Each Solution)

by Indo
Accurate pH 7 and pH 4 reference standards with an electrode storage solution bottle containing 3.3 mol/L of potassium chloride (KCl), Can be used with any brand of pH meter or pen, Perfect calibration solution when pH balancing plant fertilizer solutions, aquariums, aquaponics, and even pools, Solutions are safe and individually sealed in bags for shipping, Made and supported in Canada
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