Bluelab pH Probe ducting and is used by many

and is used by many growers as a plant tonic during the flowering and fruiting stages

Potassium and Magnesium

Allowing you to keep an eye on your nutrient levels from anywhere

boosters and additives

Bluelab pH Probe ducting and is used by manyBluelab pH Probe A replacement probe for Bluelab Combo and pH Meters, and Guardian Monitors The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that test the pH value of a solution. Unfortunately pH Probes do not last forever as they age through normal use and will eventually fail. With good care and use (keeping the probe tip wet and cleaning once a month) you will extend its life. The Bluelab pH Probe