Causes of death of parrot fish after changing water:

1. Difference in water temperature. The death of parrot fish after changing the water may be caused by the large difference in water temperature. In this case, the temperature needs to be controlled in time.

2. Large amount of water change. Changing too much water can also lead to the death of parrot fish. No matter what kind of fish you raise, you cannot change the water all at once. Generally, a water change of 1/3 to 1/5 is more appropriate.

3. Hypoxia. What parrot fish are most afraid of is lack of oxygen. Hypoxia may also be the reason why parrot fish die after changing the water. At this time, they need to explode with oxygen.

4. Poor water quality. The quality of the new water does not meet the feeding requirements or is too different from the old water.

The correct way to change the water for parrot fish:

1. Dry the water appropriately. The water contains substances that are harmful to parrot fish. It is recommended to prepare tap water in advance and leave the tap water in the sun for about three days to evaporate the harmful substances.

2. Change the water regularly. Do not change the water for parrot fish every day, nor do not change the water for parrot fish for a long time. This will generally affect the growth of parrot fish. It is recommended to change the water for parrot fish every four days, or you can change the water every other week.

3. Control the amount of water. Do not change all the water. Generally, you need to change one-third or one-fourth of the water for the parrot fish. After changing the water, the water temperature can be controlled at about 28°C, which is more conducive to the growth of the parrot fish.