Growth Technology EC Calibration Fluid Keeps Your EC Meter Reading True
Choose the standard that matches your meter. This 300ml calibration fluid comes in two EC values: 1.413 mS/cm, the most common calibration point for grow room EC meters, and 2.76 mS/cm, for meters that call for a higher calibration point. Check your meter's manual before you buy, as calibrating to the wrong value will throw every reading off.
Use it to calibrate EC meters, monitors and controllers. Regular calibration keeps your nutrient strength readings accurate, so you feed at the strength you think you are.
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