HM Digital Pro Series Pen style pH/TDS/EC/Temp meterCOM 300: Waterproof Professional Series pH EC TDS Temp Meter The COM 300 is a professional grade level pH EC TDS Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total

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High Calcium levels “LOCK-UP” Sulfur which is necessary for the formation of Chlorophyll

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Providing 15'' x 15'' x 35'' of storage space this bag leaves plenty of room for all your stinky stuff while keeping a stylish appearance and a great price point

12000 hours of brush life makes this little pump an industry standard workhorse

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Weight: 101

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