Aquaponic System In quarter 4 we had to set up our own aquaponic system. The group I was in we had to make sure the tank and water were clean enough for the fish. e had to make sure we understood the nitrogen cycle and why it's is important to the aquaponics. We had rocks and plants to keep the tank clean. We had to talk to the other group who raising plants because in the aquaponic system the plants are what keeps the water clean. That was it to learn about the nitrogen you can click on the link or look at out poster board. We had 6 fish that although one of them die. Now we have 5 fish and we think one of them die due to the fish tank not having enough plants to keep the water clean. After that, we were able to get more plants to get the fish tank clean.