if the water in the fish tank is too cold? If the water in the fish tank is too cold, you can use a heating rod to raise the water temperature. If you raise tropical fish, the water temperature requirements are relatively high, at least to maintain above 20 degrees Celsius, if the temperature is too low, the vitality of the fish will decline, and may even be frozen to death. If it is a eurythermic fish, as long as the temperature is kept above 5 C, but higher water temperature can also make it more active.
1, goldfish: goldfish is one of the three ornamental fish, evolved from crucian carp, its variety, color is also very rich. It is usually divided into four categories, namely grass species, culture species, dragon species and egg species, of which five species are representative, namely grass gold, red dragon eye, crane top red, bubble and black longevity.
2. Koi: Koi is a kind of high-grade ornamental fish. It is bred from carp. Its body length can reach about 1 meter. This kind of fish has mixed feeding habits, mild nature, likes to swim in groups, and is easy to raise, and has strong adaptability to temperature, but low temperature will affect its growth rate.
3. Medaka: There are many species of medaka. The artificially bred medaka is also a very good small ornamental fish. Compared with other tropical fish, its greatest advantage is that it can live without oxygen and heating equipment. Moreover, different species have different shapes and colors.
