Tropic Marin No2/No3 Nitrite/Nitrate Test

Nitrite/Nitrate test

Product description:

For determining the nitrite and nitrate concentration

Nitrite ions (NO ₂ ^– ) and nitrate ions (NO ₃ ^– ) are formed from ammonium (NH ₄ ⁺ ) in the nitrification process. Nitrite is formed in the first stage of the bacterial process. If nitrification is functioning properly, the nitrite is converted to nitrate in the second stage. In saltwater aquariums, elevated nitrate concentrations disrupt the growth of sensitive corals. A danger of high nitrate levels for all aquariums is that they strongly promote algae growth. In rare cases, nitrate deficiencies can also occur. Therefore, the nitrite and nitrate concentrations in the aquarium water should be checked regularly.

Nitrite levels should generally be below 0.2 mg/l in all aquariums. In saltwater aquariums, nitrate concentrations should not exceed 20 mg/l. When caring for stony corals, nitrate levels should be below 10 mg/l. Nitrate levels below 50 mg/l are recommended for freshwater aquariums. Nitrate levels depend on the general conditions in the aquarium.

With the Tropic Marin ^® Nitrite/Nitrate test can precisely measure a nitrite content of 0 to 2 mg/l and a nitrate concentration of 0.5 to 50 mg/l using finely graduated color scales.

The advantages at a glance:

• Measuring range: NO ₂ 0 - 2.0 mg/l
• Measuring range: NO ₃ 0.5 - 50 mg/l
• Resolution (accuracy): NO ₂ 0.03 mg/l
• Resolution (accuracy): NO ₃ 0.5 mg/l
• to determine the nitrite/nitrate concentration in the aquarium
• sufficient for approx. 50 applications

Recommended use:

Nitrite determination:

1. Shake the dropper bottles before use!
2. Rinse the glass cuvette with tap water and then several times with aquarium water.
3. Using the dosing syringe, fill exactly 5 ml of aquarium water into the glass cuvette.
4. Add 5 drops of test reagent A, close the glass cuvette with the stopper, and shake the solution briefly.
5. Add 2 drops of test reagent C, close the glass cuvette again and shake briefly.
6. After 3 minutes of development time, place the glass cuvette on the white circles of the nitrite color chart and compare it with the opposite color patches in daylight. To do this, look into the opened cuvette from above. Move the sample on the color chart until the cuvette and the color patch above it show the same color. If the colors do not exactly match, an intermediate value must be derived.
7. Read the measured nitrite value under the corresponding color field.

Nitrate determination:

1. Shake the dropper bottles before use!
2. Rinse the glass cuvette with tap water and then several times with aquarium water.
3. Using the dosing syringe, fill exactly 5 ml of aquarium water into the glass cuvette.
4. Add 10 drops of test reagent A, close the glass cuvette with the stopper and shake the solution briefly.
5. Add 10 drops of test reagent B, close the cuvette again, shake briefly and set aside.
6. After 3 minutes of development time, add 4 drops of test reagent C, close the glass cuvette again and shake briefly.
7. After another 3 minutes of development time, open the test cuvette and place it on the white circles of the nitrate color chart. Compare it with the opposite color fields in daylight. To do this, look into the opened cuvette from above. Move the sample on the color chart until the cuvette and the color field above it show the same color. If the colors do not exactly match, an intermediate value must be determined.
8. Read the measured nitrate value under the corresponding color field. Correct the measured value if necessary (see table below).
9. After the measurement, rinse the glass cuvette and syringe thoroughly with tap water.

A notice:

Nitrite concentrations influence nitrate measurements, so the nitrite concentration should also be measured before performing the nitrate measurement and the nitrate results should be adjusted if necessary according to the table below. High nitrite levels occur primarily in aquariums during the running-in phase or in tanks with nitrate filters.