Angelfish generally don't need additional oxygenation, but they do require extra oxygen in some special situations.
No Oxygenation Needed Under Normal Circumstances: Angelfish don't have extremely high requirements for the dissolved oxygen content in water. So, during regular cultivation, generally, there's no need for extra oxygenation. As long as the water quality is kept good, the oxygen in the water usually meets the needs of angelfish.
Oxygenation Needed in Special Situations:
- When Sick: When angelfish are sick, their breathing may be affected. At this time, extra oxygen is needed to help them recover.
- When the Water is Turbid: If the water becomes turbid, the dissolved oxygen content in the water will decrease. In such a case, if water change can't be done in a timely manner, appropriate oxygenation can be carried out to ensure the oxygen content in the water.
- In a High - Temperature Environment: Discus angelfish are fish that thrive in high - temperature and high - oxygen environments and require a relatively large amount of oxygen. In a high - temperature environment, the solubility of oxygen in water will decrease. Therefore, extra oxygenation may be needed to ensure sufficient oxygen in the water.
- Long - Term Oxygen Deficiency: Long - term oxygen deficiency can lead to slow growth and development of angelfish. So, when breeding, pay attention to maintaining the oxygen content in the water.
In conclusion, although angelfish generally don't need oxygenation, in special situations such as when they are sick, the water is turbid, the environment is hot, or there is long - term oxygen deficiency, appropriate oxygen supplementation is still required. Therefore, when breeding angelfish, it is recommended to prepare an oxygen pump for emergencies.