You can also stare at your meter until you are blue in the face and it won't show you how to grow your plants properly. By all means do as you see fit, I am not trying to convince you otherwise. I am just seeing a whole new group of growers staring at their screens or magic nutes while ignoring their plants. They over analyze every little detail and end up horrible at growing and it's usually the newbies. Anyway as I say, do what you like. The data a meter can provide can be useful in the right hands.