How to change the water of the giant mermaid

To change the water in the fish tank of the colorful giant fish, you need to put the new water in the sun for two or three days. Do not pour it directly into the fish tank. It should be noted that the temperature difference between the new water and the old water should be controlled within 3 degrees, and only one-third of the new water should be replaced every time. When pouring water, slowly pour it along the wall of the tank. In addition, pay attention to disinfecting the fish tank and filter.