The Red Sea Nitrate Pro Test Kit has an easy to use colourmetric comparator, to provide the high resolution required for the accurate dosing of NO3-PO-4-X, which will keep complete control of algae nutrient levels in marine aquariums. This complete kit tests levels of nitrate from a range of 0.06-15 ppm with an accuracy of +/- 0.06 ppm. Enough for up to 100 tests.