The best water temperature for goldfish is about 20-28 degrees. The temperature difference cannot exceed 4 degrees when changing the water. When the water temperature exceeds 30 degrees, it is necessary to mix it with cold water 10 degrees lower than the water temperature of the fish tank in time to cool down, otherwise it will stop eating or stop growth situation. The same happens when the water temperature is below 10 degrees. It is necessary to replace 1/3 of the water in the fish tank, and then pour the water whose temperature difference does not exceed 4 degrees into the fish tank to adjust the temperature.

Although goldfish can adapt to water temperature very quickly and can withstand high and low temperature, it does not mean that goldfish can withstand high temperature Affected by a large temperature difference, especially in juvenile goldfish, this feeling will be more obvious. Under normal circumstances, the temperature difference between day and night of goldfish in the incubation period should not exceed 3 degrees, and the temperature difference in the fry period should not exceed 5 degrees. , The temperature difference between day and night in the adult fish period should not exceed about 7 degrees.