The most common reason why goldfish keep their mouths open is lack of oxygen. This is more likely to occur at night when the air pressure is low. When the density of fish tanks is too high or the water quality becomes poor, the dissolved oxygen in the water decreases dramatically, which will cause the lack of oxygen in goldfish. At this time, most goldfish will keep their mouths open to let water flow through the gills to get oxygen, and often float to the surface of the water, which is often referred to as the floating head phenomenon. After symptoms occur, oxygen or water should be changed in time to provide them with dissolved oxygen.
When you see a goldfish with its mouth open all the time, the first thing that comes to mind is the lack of oxygen in the water, which often occurs at night when the air pressure is low. At this time, the accompanying phenomenon is that goldfish float to the surface of the water collectively. Goldfish keep their mouths open to allow more water to pass through their gills in order to get more oxygen, and float to the surface because the oxygen concentration is relatively higher near the surface. The lack of oxygen in the
water may be due to the fact that the fish tank is too small, the density of goldfish is too high, and the oxygen in the water is not enough to support so many fish. In addition, if the water is not changed for a long time, the water quality will deteriorate and the dissolved oxygen will be greatly reduced, so that the goldfish can not get oxygen normally.
2. How to treat
goldfish with their mouths open all the time? When it is determined that goldfish with their mouths open all the time is caused by lack of oxygen in the water, it is necessary to find ways to provide more oxygen for goldfish. One way is to change to a bigger tank, so that the goldfish have more water to survive, so that each goldfish can get more resources and oxygen. It can also improve the water quality in the fish tank and increase the dissolved oxygen in the water body by changing the water in time. Another way is to use a machine to oxygenate the fish tank, which costs more, but the effect will be better.
