Tropic Marin Nitrite/Nitrate Professional Test

Nitrite measuring range: 0 - 1.0 mg/l

Nitrate measuring range: 0 - 20.0 mg/l

Nitrite solution: 0.002 mg/l

Nitrate solution: 0.05 mg/l

Nitrate ions (NO3–) are formed as the end product of nitrification from ammonium (NH4+). In the first stage of the bacterial process, nitrite (NO2–) is formed, which is highly toxic, especially to freshwater animals. With proper nitrification, the nitrite is converted to the comparatively non-toxic nitrate in the second stage. Elevated nitrite levels above 0.05 mg/l occur primarily in aquariums during the initial setup phase or in aquariums with nitrate filters.

Nitrates affect water quality in aquariums: In saltwater aquariums, elevated nitrate concentrations disrupt the growth of sensitive corals. A danger of high nitrate levels in all aquariums is the strong promotion of algae growth. In some reef aquariums, extremely nutrient-poor conditions are created – here, nitrate deficiency can occur. Therefore, the nitrate concentration of the aquarium water should be checked regularly.

For nitrate in freshwater aquariums, levels below 50 mg/l are recommended, while in saltwater, concentrations should not exceed 20 mg/l. When keeping stony corals, nitrate levels below 10 mg/l are desirable. Lower limits for nitrate depend on the general conditions in the aquarium.


50 ml Reagent A
20 ml of reagent B
10 ml of reagent C
5 ml of standard reference solution
1 glass cuvette 20 ml
1 dosing syringe 20ml
1 dosing syringe 1 ml with attachment
2 color cards
1 comparator
1. Instructions for use

Safety instructions:

Danger Danger

H315 H319 H225 H226

P102 P305+P351+P338 P210