
These goldfish can be prone to different types of infections if you keep them in water that is too cold. The truth is that the immune systems of these goldfish can be somewhat fragile. You might wonder why a fancy goldfish would need to have a heater in its tank. They can die if you let the temperature in the tank go below 60 degrees Fahrenheit. However, this isn’t the case for the fancy goldfish. Then, he or she will become sluggish and end up hibernating. In this situation, the metabolism of the goldfish will go down. H owever, the common goldfish can be healthy even in much colder water. Though this is typically the case, there are situations where a heater would be very helpful.Īny goldfish can be healthy in temperatures in the 60s. People think of goldfish as very simple pets with very simple needs. Many people aren’t even aware that a goldfish could potentially need a heater. You can accomplish this with a small table fan that you set up to blow over the top of the water, or you can even get a cooling fan that has been made especially for aquariums There are even times where you might need to make the tank a little bit cooler, like during the hot summer months. You should keep in mind that even though you don’t usually need a heater for your goldfish tank, you might need to modulate the temperatures at some point. With these types of goldfish, during the winter months, you might need a heater for your tank. However, there are some fancy breeds of goldfish that can only tolerate water that is warmer than about 55 degrees Fahrenheit. The common goldfish can also be fine in colder temperatures, even if these temperatures go down to freezing.

However, you need to keep in mind that this is not the case for all goldfish.Īny goldfish can thrive in moderately warm temperatures, meaning between 60- and 70-degrees Fahrenheit. Slim-bodied goldfish can typically tolerate very low temperatures. If the temperature in your home is above freezing, you probably don’t need a heater for your goldfish. What Type of Heater Is Best for a Goldfish Tank?.
