Ok, I got my Hanna PPM meter and I just got in my ph 7 buffer solution. They say I need to soak my meter in the solution overnight before I can calibrate it. Am I suppose to leave the meter on or off? The instructions don't say. Also, what all solutions do I need to take care of my meter? Do I need a storage solution too? And how am I to use the chart on the back to determine my plant's needs? Right now, it's going on its second week in blooming phase. No buds have sprouted yet. Is that normal? Thanks in advance.