4 in 1 H2/PH/ORP/TEMP Meter Digital Water Quality Monitor Tester for Pools, Drinking Water, Aquariums

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4 in 1 PH/TDS/EC/Temp Meter Waterproof PH Meter Water Quality Meter PH tester for Pools, Drinking Water, Aquariums

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5 in 1 PH/TDS/EC/ORP/Temperature Meter PH Meter Digital Water Quality Monitor Tester for Pools Drinking Water Aquariums, It is suitable for home, swimming pool, drinking water, and amazing digital water quality monitor for aquarium. Wholesale 5 in 1 PH meter

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20pcs/lot Pocket Pen Water PH Meter Digital Tester PH-009 IA 0.0-14.0pH for Aquarium Pool Water Laboratory, This digital pen style pH meter is an ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Wholesale Pocket Pen Water PH Meter.