The Bluelab� pH controller automatically monitors and fine-tunes the pH levels for you. Set your pH parameters and let the Bluelab� pH Controler keep you on point dosing in your set direction pH up or down solution, not both. You simply set it, and forget. The pH is taken care of. So you can relax� We know pH levels can be the difference between a great crop and well, a disaster. Measuring and adjusting nutrient solution levels constantly can be time-consuming. And let�s face it; you have better things to do. The Bluelab� pH controller gives you hands-free monitoring and dosing of solution pH levels. Simple.