Bluelab pH Pen + EC Pen + Probe Care Kit Set OT5 Noisy fans are a thing

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Bluelab pH Pen + EC Pen + Probe Care Kit Set OT5 Noisy fans are a thingBluelab Water And Nutrient Testing Set pH Pen + EC Pen + Probe Care Kit The Bluelab Water and Nutrient Testing Set is the perfect combination of tools for any hydroponic grower looking to accurately measure and monitor pH, conductivity, and temperature in their system. The set includes a pH pen, an EC pen, and a probe care kit to ensure the longevity and accuracy of your testers. The Bluelab pH Pen allows for quick and easy monitoring of pH and