This is a color specific test reagent that allows you to accurately measure the concentration of NO3 (nitric acid ion) in an aquarium in 0.25 ppm increments.
When used with this test kit and phosphate pro, you can precisely add the NO3:PO4-X (biological reducer of nitrate & phosphate), one of the Redseas complete leaf care programs.
Measurements: 100 times
Range: 0 - 64 ppm