What is Reddit's opinion ofCoZroom Pocket Size pH Meter with ATC and Backlit LCD, 0.05pH High Accuracy, 0-14 pH Measurement Range, 0.01 Resolution Handheld, Measure Household Drinking Water(Red)?
Bluelab PENPH pH Pen, Digital Meter for Water with Easy Two Point Calibration and Double Junction Probe Test Kit for Hydroponic System and Indoor Plant Grow, White