SoLowDoughLow
Mediocre grower
Hell yea, i'm always on top of calibrating my ph pen. I didn't even realize you could calibrate the ppm pen. I suppose maybe I should get some calibration solution for it. I'm done fucking around!You will like the blue lab. I have a routine at the first of the month i calibrate the PH and ppm meter ever month and you will always have accurate readings . You will need to keep a few things around like PH 7 ,PH 4, Blue lab 2.77 solution and PH storage solution for the PH probe. You will need to read the instruction the first few times you do it.