Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe Indoor + Greenhouse Fans Essential Magnesium: Provides magnesium for

Essential Magnesium: Provides magnesium for chlorophyll synthesis

Gallons Capacity: 60

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Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe Indoor + Greenhouse Fans Essential Magnesium: Provides magnesium forBluelab OnePen With replaceable pH, Conductivity (EC) & Temperature Probe The Bluelab OnePen is the ultimate tool for growers seeking precision and convenience in monitoring essential parameters for plant health. This innovative 3 in 1 device measures pH, Conductivity (EC PPM), and temperature, ensuring optimal plant nutrient uptake. With its ergonomic design and high contrast backlit display, the OnePen is user friendly, allowing simultaneous