Predicate All discussions of research papers on nitrate must be predicated with a caution. The 10 ppm of nitrate (NO3-N) of the scientists, (the Hach test kit and the Lamotte test kit) is a 44 ppm test level of nitrate (NO3) via the “normal” aquarium test kits (API aquarium test kit, the Seachem Multitest kit, … Continue reading 5.4.1. Nitrate in Depth