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instructions and a 9V battery in a protective
100-gallon durable grow bag
7)If the lock sign mark on the filter is not lined up with the indication mark on the filter cover
You can feel good about making better choices for the environment
HM Digital Pro Series Pen style pH/TDS/EC/Temp meter Fertilizer instructions and a 9V batteryDescription COM 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 and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical Conductivity