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Elos Aqua Test Nitrite

Elos Aqua Test Nitrite
Elos Aqua Test Nitrite

The activity of the bio-filter in an aquarium system can be divided in mineralization and nitrification.
The products of the mineralization process are ammonia and organic acids. The next step of decomposition is the oxidation (nitrification) of ammonia and ammonium to Nitrite (NO2).
Nitrite has a toxic effect on fish because it oxidizes hemoglobin to methemoglobin.
While hemoglobin is responsible for the transport of oxygen, methemoglobin lacks this ability!

Nitrite concentrations higher than 0.05mg/Lt (ppm) of NO2 are not acceptable.

For these reasons, the periodical analytical valuation of nitrite in the aquarium should be considered, specially during the aquarium set-up and, periodically, to avoid the activity loss of the bio-filter system.

ELOS AquaTest NO2, as well as all the other colorimetric test kit of this line, grants high accuracy thanks to several procedures. The precision of a colorimetric test kit is, in fact, strictly related to the precision of the color chart. In these test we use “RealColor” technology, an accurate system to calibrate the color chart compared to the reagents, on each production batch. In combination with the use of NIST (National Institute of Standard and Technology) certified samples, this grants high accuracy and constant test results.

Test kit reagents are very delicate, their accuracy is significantly influenced by storage. Nitrite reagents are, together with Nitrate and Ammonia reagents, the most delicate ones and can be strongly influenced by stocking procedures/time. For this reason we keep our stock strictly under control and we suggest, to all our retailers, to do the same ù in order that on the shelves ONLY the most actual and fresh production batch is available. When you purchase a test kit be sure to check the Best Before Date.


  • Easy reading:RealColor” technology.
  • High precision: thanks to the use of calibrated dropper
  • NIST validation: each batch is validated using NIST (National Institute of Standard and Technology) samples
  • "Safe reagents": reagents and testing procedures are based on Low Risk Reagents. None of our test kit are based on Toxic Reagents.
Price: $24.99
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