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CCZRD 7in1 PH Meter Digital Water Quality Tester PH/TDS/EC/Salinity/ORP/S.G/Temperature Measuring Pen Aquariums Monitor(Without backlight)
YFDGD Water Tester 6in1 Wifi Water Quality Tester PH/EC/TDS/SALT/G.S/Temp Meter Analyzer APP Online Remote Monitoring Multipurpose Accurate Easy
