Bluelab pH Pen - Temperature Compensated Digital pH Tester Beneficial Inoculants Safety: Overheat protection

Safety: Overheat protection

reliable replacements

these mount directly into your ductwork — giving you a cleaner install

Use it outside the grow room for best results

Bluelab pH Pen - Temperature Compensated Digital pH Tester Beneficial Inoculants Safety: Overheat protectionBluelab pH Pen Temperature Compensated Digital pH Tester Best for: growers who want a simple, accurate handheld pH check on their nutrient solution or run off. Our thoughts This is the pen most new growers should own before anything else. Getting pH right matters more than almost any other single number in growing, and this makes checking it a five second job instead of a guessing game with strips. The Bluelab pH Pen is a handheld device for measuring