The Bluelab Grower’s Toolbox combines the essential tools to easily manage crops by measuring the pH, conductivity (ppm) and temperature of the nutrient solution. Learn basic hydroponics with The Grow Book. Keep growing with the ultimate handy team, the Bluelab pH Pen and Bluelab ppm Pen. The included Bluelab Probe Care Kit makes maintenance easy and maximizes the life and accuracy of the pens’ probes.
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