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Bluelab Inline pH Probe (Replacement Probe Guardian Monitor Connect In-Line) Soil Meters, pH Testing & Dosing Garden Care
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Amazon.com: Bluelab MONGUACONIN Guardian Monitor Connect In-line for pH, Temperature, and Conductivity Measures, Easy Calibration and Data Logging (Connect Stick not Included) : Industrial & Scientific
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Bluelab Guardian Monitor - 2 year warranty (6 months on probe). – Sunset Hydroponics and Home Brewing
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