top of page

Instructions - 1 step only


Keep out of reach of children.
Attention: Before any use of the vial test or measuring scoop, make sure it is washed with RO water only and dry it up with a soft paper.


Results of Royal Nitrite professional fresh water test kit are in PPM.
Each kit will give you 100 tests.


1 step only:

  1. Using the 5 ml syringe, add 5 ml of aquarium water to the test vial.
  2. Add to the test vial - 2 Drops of NO2 reagent and swirl gently for 30 seconds.
  3. Allow it to stand for 2 minutes.
  4. Hold the test vial next to the supplied color chart on a part of the chart which is white and compare the colors looking from the side of the test vial. Read the corresponding nitrite content. An intermediate color corresponds to intermediate nitrite content.


  • Keep your fish aquarium healthy and thriving by using Royal Nature advanced test kits. Testing your aquarium water's Nitrite levels regularly with our easy-to-use ROYAL NO2 PROFESSIONAL TEST is recommended. Testing water parameters on regular basis, helps prevent many invisible water problems that can be harmful to fish. When left without treatment, high Nitrite can lead to an unwanted toxic water, poor fish health and death. Nitrite itself is broken down into Nitrate which is less harmless to fish. Testing with Royal Nature professional test kit is fast, easy, and accurate. The ROYAL NO2 PROFESSIONAL TEST for freshwater aquariums test for harmful Nitrite levels from 0-5 mg/L and easy to read color chart. contains 100 tests. 

bottom of page