The suitable water temperature range for angelfish is between 24 and 32 degrees Celsius, and the most preferable temperature is from 26 to 28 degrees Celsius. Within this temperature range, angelfish have a hearty appetite, grow rapidly, and can maintain a stable growth state. If the water temperature is too low, the appetite of angelfish will be affected, and it may even lead to health problems. Therefore, fish keepers need to use a heater to keep the water temperature within the suitable range, especially when the air temperature is low.
In addition, angelfish also have certain requirements for water quality. They are suitable to live in water that is slightly acidic to neutral, and the water body is required to be clean, clear, and have a low content of organic matter. Regularly changing the water to keep the water quality clean and ensure there is sufficient oxygen is the key to ensuring the healthy survival of angelfish. By controlling the appropriate water temperature and water quality, the growth and health of angelfish can be effectively promoted.