HM Digital Waterproof pH Meter PH-200 cloning-&-seed-starting A proper greenhouse ventilation system

A proper greenhouse ventilation system is incredibly important to any grow operation

Rated GPD: 28

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The ROI-E720's unrivaled safety

HM Digital Waterproof pH Meter PH-200 cloning-&-seed-starting A proper greenhouse ventilation systemHM Digital Waterproof pH Meter, PH 200 The PH 200 is a professional grade pH Temp meter ideal for all pH testing water. With its advanced microprocessor it provides highly accurate dependable readings in such applications as hydroponics, purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, and agriculture.