Algae control test kit from Red Sea Contains: Nitrate test kit (100 Tests) Phosphate Test Kit (100 Tests) The Red sea Algae control kit comes with high resolution colorimetric comparator tests for the exceptionally high resolution measurement of Nitrate and Phosphate. The Nitrate & Phosphate tests are essential for the accurate dosing of Red Sea\'s No3:Po4-X (Biological Nitrate & Phosphate reducer) which is part of the Red Sea Reef Care program. The vials are even made from Opti-white glass to ensure the most accurate results possible! Nitrate Pro: Accuracy: 0.06ppm Range: 0.06-15ppm Test Type: Comparator Number of Tests: 100 Phosphate Pro: Accuracy: 0.014ppm Range: 0.014-1.6ppm Test Type: Comparator Number of Tests: 100