blakesurdaddy
Well-Known Member

Its cheap is why im weary, anyone use this HM digital says it goes from 0 -9999 ppm reading. can i use this in my hydro system. heres the webpage
http://www.eseasongear.com/hmditdme.html
and again
http://www.amazon.com/HM-Digital-TDS-EZ-Tester-Purity/dp/B002C0A7ZY