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YFDGD Water Tester 3 In1 EC Meter TDS Temperature Tester Conductivity Water Quality Measurement Pen 0-9999ppm For Swimming Aquariums Multipurpose Accurate Easy(Not Backlit)
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YFDGD Water Tester PH Meter 0.01 High Precision For Water Quality Tester With 0-14 Measurement Range Suitable Aquarium Swimming Pool Multipurpose Accurate Easy(Yellow)
