In an aquarium that has been running for a long time, useful bacteria have formed in the tank and filters that help reduce pollutants. By contrast, these bacteria are still missing in a newly furnished complete aquarium set. As an aquarium newcomer, you also do not have the option of providing the necessary bacteria via used filter media. In freshly equipped tanks, there is inevitably a dangerous increase in nitrite, which can mean death for fish. Therefore, let your tank acclimate for at least three weeks with the equipment running before you introduce animals. During this time, perform water tests at intervals of seven to ten days, especially for nitrite. Bacterial cultures for the tank are also available on the market. Caution is also advised after the start-up time: test the water values again before the introduction of residents. Observe the animals closely during the first few weeks and continue to regularly check the water quality. Learn more now!