in cold weather? If you raise eurythermic fish, such as goldfish, koi, etc., as long as the temperature is not so low as to cause the water surface to freeze, the fish will basically not die. Because the specific heat capacity of water is relatively high, the change of temperature will not immediately change the water temperature, so even if the temperature is below zero, the water will not easily freeze. But if it is a tropical fish, the water temperature below 20 degrees Celsius will affect its health, and lower temperatures will also lead to the death of the fish.
in winter? 1. Mary fish: Mary fish is a common tropical fish. Its size is relatively small, but its ability to resist pollution is very strong. It can survive in a low dissolved oxygen environment. It usually feeds on algae, but it can also eat aquatic invertebrates. Because it has certain requirements for temperature, it is better to use a heating rod to control the temperature.
2, zebrafish: zebrafish is a small tropical fish, the length of only 4-6 cm, its temperament is mild, almost all day in the fish tank will keep swimming, very easy to raise. It is suitable for survival at the water temperature of 20-23 C, but it can also tolerate the low temperature of 11-15 C, and the requirement for water quality is not high.
3. Map fish: Map fish is native to South America and requires high temperature. It must be heated in winter, and the water temperature should be controlled between 22-26 ℃. If the temperature is low, it is easy to cause the death of fish, usually mainly feed it some live bait or artificial feed.
