Overview :

pH Probes should be routinely cleaned and calibrated using Bluelab pH 4 & 7 Calibration Solutions to ensure the highest level of accuracy.

Serious commercial growers should clean and calibrate their pH probes every 1 – 2 weeks.

Some growers may need to do this procedure more frequently.

The frequency of cleaning and calibration that is required is all dependent on the cleanliness of the hydroponic system and the type of crop which is being grown.