Aqua Master EC1413 Calibration Solution - 100ml water tank It is really unstable

It is really unstable

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Aqua Master EC1413 Calibration Solution - 100ml water tank It is really unstableAqua Master EC1413 Calibration Solution 100ml Compatible with all Aqua Master EC Pens. Ensure precise measurements with this essential calibration solution for Aqua Master EC Pens. This 100ml bottle of EC1413 solution helps maintain the accuracy of your conductivity meter, guaranteeing reliable readings for your water quality tests. Compatible with all Aqua Master EC Pens, this solution is a must have for hobbyists, professionals, and anyone seeking