This is the storage solution for your pH pens. We recommend always storing the probe in this solution when the pen is not in use. Also ensure to soak new pH probes, and 'hydrate' pH pens on a monthly basis.
Hy-Gen is based in Perth, W.A and manufactures hydroponic water control supplies. Hy-Gen products make maintaining pH and EC levels easy and affordable. We also have their range of solutions for testing and calibration of your meters at home.