In the winter is very cold in the North, feeding goldfish should also be prepared toheater, or moment of carelessness, such as heating to temporarily suspend may, resulting in unnecessary losses.
Inexpensive Aquarium Heaters because tropical fish survive temperature is 24~28℃, maintains proper temperature don't consume that much, once the temperature reaches requires less power consumption.
Most families use of heaters are a single small heating elements. There are many varieties to choose from, and with a constant temperature control with GE, safe to use, and reliable. Heaters have a benefit that is used to treat sick fish or provide higher water temperatures for some fish to promote their breeding.