Bluelab pH Pen - Temperature Compensated Digital pH Tester Bulky this is where you finish

this is where you finish the job

Diameter options: 4"

runs cooler than HPS

and stress recovery across soil

Regulator (nutrient uptake and stress support)

Bluelab pH Pen - Temperature Compensated Digital pH Tester Bulky this is where you finishBluelab pH Pen Temperature Compensated Digital pH Tester Complete Feeding, No Guesswork Our thoughts Straightforward nutrients that work consistently without complications. Simple, reliable feeding that delivers results. The Bluelab pH Pen is a great little hand held device for measuring the acidity alkalinity of your nutrient solution. Bluelab products are trusted by growers across the globe for their accuracy and reliability the handy new pH Pen is