. If you want to judge whether the amount of oxygen in the fish tank is sufficient, you can test it with an oxygen detector. Usually only when the feeding density is relatively high, the symptoms of hypoxia will occur. If there are more fish or some large fish, special oxygen pumps need to be prepared. Generally, the oxygen pump should be turned on for 24 hours to prevent the occurrence of hypoxia. When the fish is anoxic, it often has the performance of floating head.
can fish anoxic have 1, swim slow: When fish is anoxic, can show above all lazy, swim to rise slower, look to do not have what vigor. At this time, we need to oxygenate the fish tank first to see the situation, because although hypoxia will have these manifestations, but these manifestations are not necessarily caused by hypoxia, if oxygenation is useless, it may be sick.
2. Floating head: When the oxygen content in the water is relatively low, the fish will have other manifestations, such as floating head. Floating head is to breathe oxygen on the surface of the water. If it is not oxygenated at this time, its survival will be threatened.
3. Show your belly: If the lack of oxygen is serious, the fish will show its belly and swim sideways. At this time, it is basically impossible to save it. Therefore, it is necessary to oxygenate it in advance. It is better to turn on the oxygen pump for 24 hours, so as to avoid the symptoms of hypoxia and ensure the healthy growth of the fish.
