ravenrogers2
Active Member
I am just starting my new grow room set-up. My problem is that I just purchased a (TDS Expert Plus) TDS/EC/Temperature Step500 by sunleaves. I was already calibrated out the box. my problem is that i have no idea what I'm looking at. my readings said that it is 286ppm for just my regular tap water & my temp. was 70.5(F). Here is a pic if it helps at all. 
