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Nitrite and Nitrate in the Aquarium

DIYAQUAPROS website: http://www.diyaquapros.com FREE downloadable content! Join The DIY AQUAPRO Team ! FACEBOOK:   / diyaquapros   TWITTER: @DIYAQUAPROS Nitrite is a moderately toxic nitrogen based compound in the aquarium. Most of the time we wont and should not be able to "see" this form when using test kits. This is because nitrite is an intermediate molecule in the nitrogen cycle and is quickly oxidized to nitrate NO3- by bacteria in the genus Nitrobacter. When the nitrogen cycle is running efficiently and to completion, nitrite should be undetectable in the aquarium. Its toxicity is not as high as ammonia, but can still damage fish at moderate concentrations. Nitrate is the most oxidized form of nitrogen in the aquarium. It is the least toxic of three main nitrogen based compounds NH3 NO2- NO3-. However, Nitrate can still "shock" fish if they are pulled from an aquarium with a low concentration and put into tank with a high concentration and vise verse. Nitrate can be consumed by plants, algae and microorganisms for nitrogen assimilation. It can also be used by bacteria that live deep in the substrate where oxygen levels are 0. These Anaerobic zones promote a process called denitrification where nitrate is converted to nitrogen gas which then bubbles out of the aquarium.