ETI 6.7mS Nutrient Solution 90ml

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Nutrient Tester Calibration Solution - A ready made 6.7mS standard solution that is suitable for calibrating your ETI Nutrient tester. 

Easy to use - makes checking calibration simple.

Although your tester is calibrated when manufactured, it is recommended that you re-calibrate  your HortiCare Nutrient Tester regularly to maintain the desired accuracy of the tester and deliver optimum, reliable results.  Supplied in a 90 ml bottle.