Bluelab One Pen with Replaceable pH, Conductivity (EC), and Temperature Probe trol-master Aqua Master Aqua Master P50

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Bluelab One Pen with Replaceable pH, Conductivity (EC), and Temperature Probe trol-master Aqua Master Aqua Master P50Bluelab Bluelab One Pen with Replaceable pH, Conductivity (EC), and Temperature Probe supports airflow, filtration or environmental control in indoor grow rooms. Check the selected size, variant and suitability before purchase. Use according to the manufacturers instructions. Store and handle safely as directed on the product label.