The Red Sea Algae Control Test Kit allows you to monitor levels of nitrate and phosphate which cause algae growth in marine aquariums. This test kit has easy to use colourmetric comparators, 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 and phosphate from a range of 0.014-1.6 ppm with an accuracy of +/- 0.014 ppm.