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Amazon.com : bluelab pH Pen-Digital pH Tester - Reliable & Accurate for High Yield Crops - Hand-Held Meter - Measures pH & Temperature in Solutions and Soil Solutions - Optimize Plant Health
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BlueLab pH Pen direct from Growers House
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Amazon.com : bluelab pH Pen-Digital pH Tester - Reliable & Accurate for High Yield Crops - Hand-Held Meter - Measures pH & Temperature in Solutions and Soil Solutions - Optimize Plant Health
BlueLab pH Pen direct from Growers House
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blue lab calibration issue! wtf going on all I did was open the box and follow instructions and thos mf can't read its own brand solution 😬 : r/Hydroponics
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