What is an established aquarium?

An established aquarium is an aquarium that has gone through the nitrogen cycle. This is not "established" it is a "cycled" aquarium. The stage after cycling where the plants are reproducing and fish are growing successfully is an "established" aquarium. See related question on the nitrogen cycle.

First answer by Christino. Last edit by Christino. Contributor trust: 143 [recommend contributor]. Question popularity: 2 [recommend question]