There is no time limit for goldfish to change water, and breeders can decide according to their actual situation. If the breeder has enough time, he can choose to change the water after feeding. Because goldfish can pollute water quality when eating, changing water after eating can slow down the deterioration of water quality.

Breeders can also choose to change water at noon on sunny days, because the temperature at noon is relatively high and the sunny temperature is relatively stable, which can reduce the discomfort of goldfish after changing water.

1. Water change frequency: The frequency of goldfish changing water needs to be determined according to the water temperature. If the water temperature is on the high side, it needs to change water once every 3-5 days. Because the higher the water temperature, the faster their metabolism will be, and the water quality will easily become dirty. If the water temperature is low, you can choose to change the water every 7 days or so. Because the water temperature is low, their appetite and activity will decrease, and the pollution to water quality will also decrease.

2. Water change: As mentioned above, goldfish prefer to talk old, so the amount of water change by breeders should not be too large each time. Under normal circumstances, the amount of water changed each time can be controlled at one third of the total amount of water.

3. Replaced water: Goldfish does not have too high requirements for water quality, and breeders can choose to use tap water for breeding. However, the tap water just received contains more chlorine, so breeders need to expose them to the sun for 2-3 days, so that chlorine can be completely volatilized.