The HI781 Marine Nitrate Low Range Colorimeter is designed to accurately determine low range nitrate levels in your saltwater aquarium. With a digital read out, there is no more struggling to determine colors visually.
- Range: 0.00 to 5.00 ppm (as NO3–) [0.0 to 50.0 ppm (calculated) using dilution]
- Built-in timer so you don't miss a step.
- Saltwater Compatible