Whether zebrafish can not be oxygenated still depends on the breeding density. If the breeding density of zebrafish is high, the breeder needs to give them oxygen. Because zebrafish naturally have a higher demand for oxygen, if the breeding density is too high, the oxygen in the water will be lacking, so breeders need to give them oxygen to ensure that they live more comfortably. If the feeding density is not very high, the breeder can choose not to use oxygen. Because the water body is large and the oxygen content in the water is high, the oxygen is enough for them to absorb, so they can choose not to use oxygen.

Zebrafish have cold resistance, and they can grow in water temperature between 15-30 ℃. If the temperature in the area where the breeder lives can be kept above 15 ℃, it is also possible not to be heated. However, the most suitable temperature for zebrafish to grow is between 20-23 ℃. If the breeder has the conditions, it is best to install a heating rod for them to keep the water temperature in a stable range. Especially after entering winter, breeders need to install a heating rod for them. If conditions permit, it is best to warm them in spring and autumn. Because the heating rod can not only raise the water temperature, but also ensure the constant water temperature, so as to avoid more discomfort caused by too large temperature difference.