Bluelab Soil pH PenKnow that your nutrients will be made consistently available to your plants. The Bluelab Soil pH Pen provides a pH and temperature reading of media including soil, coco and rockwool. It works in solutions too. Accurately monitor and adjust pH levels right from the palm of your hand, no need for slurries - making soil pH measuring much quicker and easier. Features:Direct measurement of pH and temperature from media, and solutionsFully waterproofIntegrated storage cap/dibberSelectable units for temperatureBacklit LCD displaySimple two point calibration process with 30 day calibration indicatorHold reading functionLow battery indicatorAuto off functionAutomatic temperature compensation1x AAA replaceable battery included
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