fragileassassin
Well-Known Member
I also agree with this 100%Honestly you can use whatever scale you want as long as you get comfortable with taking readings and what that number means to you and your plants.
I use the 700 scale on mine because thats what it was set on when I plugged it in so thats the set of numbers I learned. The only possible issue with which you pick is communicating your readings with others. Ive confused myself trying help people more than once until I got in the habit of assuming most ppm readings here are 500.