Whether you're growing fruit, veg, flora or fauna, the pH of your soil couldn't be any more important. The Nutradip (Tri Meter) Tri Calibration Kit is a state of the art piece of garden technology which allows you to keep an eye on the pH of your soil. The monitoring system provides constant pH readings, so you know what your soil needs and when. This calibration kit makes it easy for you to get started caring for your soil. The kit contains a trio of essential calibration solutions, which will get you well on your way to impressive yields this growing season.