GH Standard Reference Solution for Calibration (pH, TDS)

Regular price Price: $24.95 CAD Sale

General Hydroponics reference solution for calibration of your pH and TDS tester pens and monitor probes.  Available in the 1 Litre size.

Purchase individually, or get a pH 2-pack Combo or 3-pack Combo of all three!

Check the TYPE sub-menu above to select which solutions you need!