Premium liquid test kit for precise nitrate measurement in aquariums Accurately detects aquarium nitrate levels as low as 0.2 ppm Dual range nitrate test kit for reef aquariums and fish-only aquariums Precision nitrate test kit ideal for sensitive reef aquariums. Maintaining a very low nitrate concentration of less than 1 ppm is essential for coral and invertebrate health. Salifert Nitrate Test Kit boasts a nitrate detection range starting as low as 0.2 ppm. Both serious reef aquarists and beginning saltwater hobbyists will find the Salifert Nitrate Test extremely easy to use. The Salifert Nitrate Test Kit does not suffer from amine interference for quick and reliable measurement of nitrate-nitrogen. 50 tests. Saltwater aquarium use only. Low range: 0.2 - 10 ppm Medium range: 2 - 100 ppm Please click on "More Information" for instructions.