Where to buy

Understanding the Nitrogen cycle


Before adding fish to your aquarium there are some important things you need to understand about how the aquarium water remains clean and healthy enough for fish to live in. The short video below talks you through this process, or read on for more.

The breakdown of fish waste, too much food and dead plant matter will cause toxic compounds – namely ammonia - to build up in the water and kill your fish.

As an aquarium is a ‘closed’ environment it means harmful waste can build up quickly because there is not enough water to dilute it or to wash it away, as would be in a pond or river.

Thankfully, there is a natural process called the ‘Nitrogen Cycle’, which we can recreate in the aquarium, to convert the toxic waste into safer compounds (The image below explains how this process works).