If the oxygen content of the water is relatively low, the fish will take a big breath in order to get more oxygen. This also happens to the floating head of the fish, which will gather at the surface and breathe in the place where the water and air are in contact. In view of this situation, it is necessary to oxygenate the water body in time, special oxygenation equipment can be used, or filtration can be installed to inject gas into the water, for most fish, filtration and oxygenation can already meet the survival needs.
If a fish breathes in the lower layer of the water, then it is very likely that its gills are sick, possibly caused by bacteria or infected insects, which will affect the gas exchange of gill filaments, and at the same time, there will be the phenomenon of rubbing the tank or shaking the fins. At this time, that wat for the fish needs to be Chan, and the water temperature also needs to be properly increased by about 1-2 deg C compare with normal water, and salt is added into the water, the salinity is between three thousandths and five thousandths, or the diseased fish can be fished out and put back after being bathed for 20 minutes.
In addition to the disease of the fish themselves, there is another possibility that the fish will breathe heavily, that is, the water quality will deteriorate. Generally, the water body in this case is relatively turbid, looks yellow or green, what we need to do at this time is to change the water in time. Usually, according to the situation of the water body, regularly replace a quarter of the water, water must be used trapped tap water, if untreated tap water, chlorine in the water will affect the health of fish, or even lead to their death.
