in winter? The fish in the outdoor fish tank may freeze to death in winter. Whether it will freeze to death depends on two aspects, one is the type of fish, the other is the temperature. If it is a tropical fish, it is basically impossible to survive, because they require a relatively high temperature and need to survive in an environment above 20 degrees Celsius. In terms of temperature, even eurythermic fish are difficult to survive in the environment below 5 C.

Two, winter fish should pay attention to what

1, feeding: winter fish should first pay attention to feeding, as a poikilothermic animal, low temperature will affect its appetite, so in winter it will become not like to eat, this time can not feed too much, feeding is not easy to eat, and digestion is relatively slow, so to control the amount of food.

2. Change water: The cycle of changing water is generally related to the season. In summer, the temperature is high and the water is easy to rot, so it should be changed frequently. In winter, the water quality is easier to maintain, so there is no need to change water frequently. Usually in winter, the water can be changed once a half month or a month, and too frequent changes are not good for fish.

3. Temperature control: In order to ensure the health of fish, it is necessary to control the water temperature in winter, and it is better to prepare a heating rod. If it is tropical fish, the temperature must be controlled above 20 degrees Celsius, while other fish should be kept at least above 5 degrees Celsius.