Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range LEDs will indicate conductivity

LEDs will indicate conductivity

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

It is not a base nutrient

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

Water pump

Bluelab pH 4.0 Calibration Solution- 250ml Emerald Harvest range LEDs will indicate conductivityIt 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