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Water pH Meter and TDS Meter, LAWNFUL pH and 3 in 1 TDS&EC Water Tester Combo, ±0.01 pH Accuracy ±2% F.S Accuracy TDS/EC/Temperature Meter, Pen Type and Handheld, PPM Meters for Home and Lab - White+Blue
$0.44
"This is part of my future hydroponic veggie garden set up! Future garden stream may be incoming"