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  • Bluelab PPM Pen

    Bluelab PPM Pen

    $94.48 USD

    Bluelab  ppm Pen The ultimate handy solution for measuring conductivity (EC or ppm) and temperature! The Bluelab EC or ppm Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. To feed plants well, we need to know what we’re feeding…