Red Sea Algae Control - Multi KitIt?? s all in the balance Red Sea?? s Algae Control Pro Multi Test Kit includes high accuracy colorimetric comparator tests for the exceptionally high accuracy 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 complete Red Sea Reef Care Program. Kit includes: ?? NO3 reagent A ?? 25ml ?? NO3 reagent B ??