Review on Sonkir Soil pH Meter: 3-in-1 Tester for Soil Moisture, Light, and pH Levels. Includes TDS Meter & Temperature Sensor for Liquid and Soil Testing by Jeff Sorensen

Like:1) pH tester comes with calibration chemicals 2) Two (2) TDS meters are included in this kit. I do not know why. One is slightly better, but still. 3) Although accuracy is questionable, the soil meter is sensitive to sunlight and my 4000w full spectrum grow light also shows soil moisture. Again, the accuracy is unknown. Dislikes: 1) The pH tester is fairly cheap, which is to be expected at this price point, but it still seems to pick up differences in acidity - I haven't gone through the calibration process yet, so I don't know its current accuracy. 2) Both TDS meters lack calibration materials or instruction manual (zero familiarization period) 3) The ground gauge is very cheaply made and I consciously try not to break it. Aside from these trivial issues, it's not bad. for money. If you're running a hydro grow, you might want to invest in slightly better quality test equipment. I'm sorry, just be honest