Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range The Aqua Valve opens to

The Aqua Valve opens to fill the tray to a set level

LEDs will indicate conductivity

Herbi’s All Natural is stuffed with a wide variety of natural ingredients to support the development of a diverse ecosystem in your soil

Water pump

Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range The Aqua Valve opens toIt is recommended that pH instruments are cleaned and calibrated at least monthly to provide you with the most accurate reading. pH measuring equipment is calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Essential for use with all Bluelab pH products for the calibration of Bluelab pH Probes. To ensure solutions remain accurate: Avoid cross contamination Decanter into a smaller plastic cup Discard sample after use Store in a cool dark