Map fish belongs to tropical ornamental fish, so it is hot water fish. Although map fish are hot water fish, they are not so easy to die when the temperature is very low. Although low temperature is not easy to die, it will especially affect their growth. In a low temperature environment, their growth and metabolism will be particularly slow, which will easily lead them not to eat food.

The favorite water temperature of map fish is 24-27 ℃. Below or above this water temperature range, it will be detrimental to their growth. When the map fish is still a seedling, the requirements for water temperature will be more stringent, because the map fish is in the growth and development stage at this time, and the water temperature will directly affect the growth.

Map fish is best raised with well water or spring water, because there are many minerals in well water or spring water, which are beneficial to the growth of map fish. In daily life, many families are raised with tap water because of the limitation of conditions. It is also feasible to feed with tap water, but before using tap water, it is necessary to aeration tap water first, because there is residual chlorine gas in tap water, and chlorine gas is a toxic gas. If map fish are raised without aeration first, it is easy to cause them to be poisoned.