Bluelab® pH Pen Meter - Measures pH and Temperature seabirdguano You can also use Hygeia's

You can also use Hygeia's Hydration as a wetting agent for foliar feeding nutrients

LED toplighting can shorten growth cycles

120 V grounded plug

and the large straight walls makes it easy to label

and they will short out if you get them wet

Bluelab® pH Pen Meter - Measures pH and Temperature seabirdguano You can also use Hygeia'sBluelab pH PenMeasures pH and temperature. Selectable units for C and F. Backlit LCD display. Double junction probe (not replaceable). Successful calibration indicator. Hold reading function and low battery warning. Fully waterproof with auto off function. Automatic temperature compensation. Along with Bluelab pH Probe KCI Solution, Bluelab pH 7 and Bluelab pH 4 Solution Sachets are now included. Range: 0. 014. 0 pH 050C 32122F. Resolution: 0. 1 pH 1C