That last distinction is the whole reason this tool exists
use an NPK tester
non-volatile
Where should I insert it
🌡️ Real-time Monitoring – Live display of temperature
7-in-1 Hydroponic Water Quality Meter – pH, EC, TDS, Salt, Temperature Tester gardening accessories That last distinction is theThis advanced 7 in 1 Water Quality Meter is perfect for hydroponic growers, gardeners, and aquarium owners who need precise readings to maintain healthy plants and environments. With the ability to test pH, TDS, EC, ORP, salt, temperature, and fertility, it provides everything you need to ensure your water conditions are just right. Comprehensive Testing: Measure pH (014), TDS (010000ppm), EC (010000 S cm), ORP, salt, temperature (060C), and fertility