
It has many names Nitrogen cycle, cycling, nitrification, biological cycle, startup cycle, break-in cycle – its what all aquariums need to undergo this process. Basically the nitrogen cycle is when beneficial bacteria are established in your saltwater aquarium.
We will discuss and learn how it works, how long it will take to get the cycle completed, ways you can do to cycle the saltwater aquarium and the important function the nitrogen process plays in keeping your saltwater aquarium working properly.
The process of the nitrogen cycle can take from 2 weeks or longer, there is no exact time frame as each aquarium set up is different.

Factors that determine where you are in the process are based on how many fish or other livestock, and organic matter you have in your aquarium.
The three components that are involved are ammonia, nitrite and nitrate. Test your water often during the process and log your readings. This will tell you what phase the aquarium is in.
The best way to monitor the nitrogen cycle process is by usng a saltwater test kit that will test the three components involve in the process.
Text and Photo Source: Saltwater Aquarium Online Guide