Bluelab ONE Pen Replacement Probe | pH + EC + Temperature Sensor Bloom Nutrient Always supervise usage if used

Always supervise usage if used by teenagers

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Bluelab ONE Pen Replacement Probe | pH + EC + Temperature Sensor Bloom Nutrient Always supervise usage if usedKeep your readings sharp and your Bluelab ONE Pen performing like new with the Bluelab ONE Pen Replacement Probe. Designed as a direct replacement for the original probe, this unit restores accurate pH, conductivity (EC), and temperature measurementhelping you stay on top of nutrient uptake and maintain a stable feed program. Instead of replacing the entire device, swapping the probe is a smarter, more sustainable way to extend the life of your ONE