4 in 1 Water Condition Tester pH/EC/TDS/Temperature (BlueTooth) 9908 cucumber string 25-1) Nitrogen (N) is important

25-1) Nitrogen (N) is important for producing chlorophyll

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4 in 1 Water Condition Tester pH/EC/TDS/Temperature (BlueTooth) 9908 cucumber string 25-1) Nitrogen (N) is important4 in 1 Water Condition Tester Bluetooth Connection pH EC TDS Temperature This is an advanced water condition tester for hydroponic nutrient solutions, aquarium water condition, pond water condition, and pool water condition testing. Advanced water condition testing pen with Bluetooth connection connecting to your mobile phone to read and save historical data. FUNCTIONS Checks pH, Temperature, TDS, EC in water FEATURES Bluetooth connection with a