Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range We recommend a target water

We recommend a target water temperature of 64-68°F / 18-20°C

LEDs will indicate conductivity

Langbeinite

and backed by a five-year warranty

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

Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range We recommend a target waterIt 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