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Non-Corrosive
providing a balanced N-P-K ratio of 5-0-1
The PH-80 has proven to be the MOST reliable pH meter in its price range
This smell proof kit comes with a hemp tray
HM Digital® COM-300 clone Non-CorrosiveCOM 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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