ELOS AQUA TEST KIT- Nitrate The Biological filtration is a method that uses naturally occurring nitrifying bacteria to detoxify nitrogenous wastes. One type of bacteria (Nitrosomonas spp.) converts ammonia to nitrite while another naturally occurring bacteria (Nitrobacter spp.) converts the nitrite into a far less harmful form of nitrogen waste: nitrate. Nitrate is the final stage of the nitrification process. Many invertebrates, unlike fish, are not tolerable to high nitrate concentrations. As a result, it is extremely important to make sure that nitrate levels do not reach high levels. In reef marine aquarium their level should not exceed 20 mg/l. A level of 10 mg/lt is the maximum for reef aquariums. For these reasons, the periodical analytical valuation of nitrate in the aquarium water should be considered, specially during the aquarium set-up and, periodically, to avoid a too high level inside the water of our aquaria. Our kit allows the determination of the Nitrate level within a range of 5 - 75 mg/Lt ELOS AquaTest NO3, 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 colors 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. HIGHLIGHTS: * 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 Elos test kit are based on Toxic Reagents.