Bluelab pH PenPlus – Replaceable Probe pH & Temperature Meter IP68 Waterproof Made in NZ 3 in 1 pH meter The Apera GroStar GS4 P Gen Model METCOMPLUS The Apera GroStar GS4 P Gen II is the most comprehensive all in one pen tester kit for serious growers reliable conductivity measurements for precise nutrient management and support confident decision making Hold Reading Function — freeze the display for hands free logging without losing your reading
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Bluelab pH PenPlus – Replaceable Probe pH & Temperature Meter | IP68 Waterproof | Made in NZ 3-in-1 pH meter The Apera GroStar GS4-P Gen Model METCOMPLUS