I know there are some clever work-arounds for this out there already, but Hanna finally made a low-range Nitrate checker:
Looking at the instructions though, it’s kinda more complicated than I thought it would be.
Marine Nitrate Colorimeter – Checker HC HI781
Accurate. Repeatable. Marine nitrate testing made easy. No more subjectivity! Ideal for aquariums and marine biology applications.
www.hannainst.com
Looking at the instructions though, it’s kinda more complicated than I thought it would be.