if they are not heated? Whether tropical fish need to be heated depends mainly on the temperature of the environment. Usually these fish live in waters between 20 and 30 degrees Celsius, and if the temperature is lower than that, they need to be heated, otherwise the fish will freeze to death. If the temperature is relatively high, it is necessary to avoid further warming, otherwise it will also affect the health of fish. Some species are hardy, such as guppies, which can tolerate 16 degrees Celsius, but it's better to heat them with a heating rod so that the fish are more energetic.
1, Mary fish: Mary fish is a relatively common small ornamental fish, its habitat environment is more diverse, so the adaptability is very strong, and the ability to resist pollution is also very good, can survive in a low dissolved oxygen environment. This fish usually feeds on algae and therefore can also be used as a cleaner fish.
2. Guppy: Guppy is the most recommended tropical fish to be raised by novices. It is small in size and has a very beautiful tail. It mainly lives in freshwater fish and is widely distributed. Its temperament is also relatively mild, so it can be mixed with other small fish, although the life span is not long, but it is easy to reproduce.
3. Zebrafish: Zebrafish are also easy to raise, with many stripes on their bodies, which make them look like zebras. This kind of fish is small and exquisite, swimming all day long, relatively easy to raise, and the requirement for water quality is not high.
