Parrot fish generally need a water change every 3 to 4 days, replacing about a quarter of the water volume each time. This is to keep the water quality fresh and prevent the fish from being affected by drastic water quality changes. During the hot summer months, as food residues tend to deteriorate quickly, it is recommended to change the water every 3 to 5 days. In spring and autumn, a weekly water change is sufficient. In winter, due to the lower water temperature and slower metabolism, a water change every half a month to a month is okay.
When changing the water, it's crucial to control the water temperature. The temperature difference should be kept within 2℃ to avoid the parrot fish losing their color or getting sick due to sudden water temperature changes. Additionally, the water quality is preferably slightly acidic soft water, with a pH value maintained between 6.5 and 7.0. This is beneficial for the health and color enhancement of the parrot fish.
By maintaining a proper water - changing frequency and following these precautions, you can ensure that parrot fish grow in a healthy and stable environment.