They also eat small fish and invertebrates such as crayfish, mussels, clams and oysters. Goldfish are omnivores, meaning they eat a wide variety of foods, including algae, crustaceans, mollusks, snails, worms, insects and other small animals. However, common-type goldfish can thrive in water as cool as 62˚F or so, and usually do best when kept in a tank with a temperature of 70-75˛F (21-23˙C). The general recommendation for a healthy temperature range for goldfish is 68-74˚F. Also, they need lots of space to swim around in, so you can’t just put them in a small tank and expect them to live happily ever after. They require a lot of attention and care, and you need to make sure that the water temperature is not too cold or too warm for the fish to survive. Koi and fish can also be kept in aquariums, but they are not as easy to keep as fish. Can goldfish live in cold water pond?ĭuring the winter, goldfish and koi can survive in the pond as long as it doesn’t freeze solid and they have plenty of food to eat, since they can survive water temperatures as low as 0c. So if the temperature drops too low, they will stop eating and die. Goldfish metabolism is controlled by the amount of heat they receive from the environment. If the conditions of your home or outdoor environment get too cold for a Goldfish, you may need a heater. Goldfish don’t need heaters – most of the time. Can goldfish live in a bowl without an air pump?Īlthough goldfish can live in temperatures as high as 30 degrees centigrade, experts recommend keeping them in water that’s between 23 and 26 degrees.What size tank do I need for 2 goldfish?.

Temperature for goldfish aquarium