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Digital Smart Seawater Salinity Meter Salt Tester Monitor for Aquariums Pool Fish Tank Seafood Aquaculture 0.1-200ppt - Water Tester
3 in 1 PH EC TDS Salt TEMP Water Tester, Smart WIFI Aquarium Seawater Salinity Meter Data Logger Monitor for Fish Tanks, Hydroponics - Amazon
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7 In 1 Water Quality Tester, PH/TDS/EC/ORP/S.G/Salinity/Temp Pen Type Water Quality Testing Meter, High Accuracy PH Tester for Drinking Water, Fish Tank, Aquarium, Swimming Pool
