Ok, my girlfriend stole this tester thing from some Hydropoincs class, and it has CF, EC, and PPM on it... I know what they stand for, but i need to know how to convert CF to PH..
Ive tested water with it, and then used regular ph test strips. The stick had 2 CFs on it, and the ph was 7.2, and another part of water was 13 CFs and the ph was below 6.2, So can someone PLEASE let me know what the FUCK this shit means.. THANK YOU
-Travis
