the goldfish had better add the oxygen in the evening, otherwise the goldfish is easy to lack oxygen. At night, the air pressure is relatively low, and oxygen is not easy to enter the water, resulting in lower dissolved oxygen in the water at night. At the same time, if there are aquatic plants in the goldfish tank, the aquatic plants can not rely on photosynthesis to provide oxygen for the fish tank at night, but will stop consuming oxygen in the water to produce carbon dioxide.
In addition, the excrement and food residues of goldfish in the goldfish tank are constantly decomposing and consuming oxygen. Therefore, the dissolved oxygen in the fish tank is generally the lowest before dawn. If you do not add oxygen to the goldfish tank at night, it is easy to cause the lack of oxygen in the goldfish, so that the goldfish appears floating head phenomenon, and even cause the death of the goldfish in serious cases.
goldfish not turn on the light at night? About whether goldfish need to turn on the light at night, this point can completely refer to the situation of nature. Fish living in rivers can survive well without light at night. As long as the water temperature and quality in the goldfish tank are well controlled, there is no need to turn on the light at night. And keeping the lights on day and night can easily make goldfish more tired and more easily frightened, which has a negative impact on the growth of goldfish.
