Cycling refers to the process by which beneficial bacteria colonize the filter media and establish a nitrogen cycle in the aquarium. This process is crucial for the health of the aquarium and its inhabitants as it helps to break down harmful toxins such as ammonia and nitrites.
Adding more salt water during this period can disrupt the cycling process and hinder the establishment of beneficial bacteria. It can also lead to fluctuations in water chemistry, which can stress the aquarium inhabitants.
Therefore, it is best to avoid adding more salt water during the cycling process. Instead, regular water changes with properly conditioned water should be performed to maintain water quality and support the cycling process.