HM Digital COM-80 HydroTester Series EC/TDS Meter Fulvic Acid & Humic Acid When the oxygen concentration returns

When the oxygen concentration returns to 19

2% 2% Water Solulble Magnesium (Mg)

stake the drip emitters around your plants

Unique squeeze-to-open handle with spring-loaded locking catch opens automatically when handles are pressed together

HM Digital COM-80 HydroTester Series EC/TDS Meter Fulvic Acid & Humic Acid When the oxygen concentration returnsThe HM Digital Waterproof EC TDS Temp HydroTester (COM 80) is easily the most advanced economically priced, reliable EC TDS meter on the market. With its versatility and durability, it is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. HM Digital Waterproof EC TDS Temp HydroTester Features: Measures electrical conductivity (EC), total dissolved solids (TDS).