Think of nutrients like a lock. pH is the key. A key factor that affects food uptake is whether your solution is acid or alkaline. We measure this in pH. The Bluelab pH Pen also measures the temperature of the solution, as root health is vital to the success of a crop. The Bluelab pH Pen provides a compact quick and handy way to manage the success of your crop to ensure maximum uptake of nutrients. Teamed with our Bluelab EC/ppm Pen, you have a handy, convenient and accurate water testing system for ensuring optimum plant growth and health.
Fully waterproof - not just water-resistant
Simple two-point calibration process for accuracy
One-year peace-of-mind warranty
Automatic temperature compensation for accurate readings everywhere