The angelfish is a tropical fish. Tropical fish refer to fish raised by human beings, which originate from tropical to temperate zones and have high ornamental value. They are generally colorful, and the adaptation range of water temperature is between 20 and 30 degrees Celsius. They have different adaptations to the acidity and alkalinity of water, but their hardness is generally soft water or water with relatively low hardness value.
Angelfish is native to the Amazon River Basin in South America and belongs to the near-tropical region. The preferred water temperature range is 24 ~ 27 ℃, and the requirement for water hardness value is relatively low, between 3 ~ 6. Therefore, judging from a variety of factors, it can be seen that angelfish is a typical tropical fish.
The lowest temperature suitable for the survival of angelfish is about 18 ℃. Angelfish belongs to tropical fish, the most suitable growth water temperature is 24 ~ 27 ℃, and the temperature difference can not exceed 5 degrees. If the water temperature is too low, it is easy to stop eating and even stop growing. In daily farming, it can be found that the lowest temperature it can survive is about 18 C. If it is lower than 18 C, it may endanger its life.
