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You’ve probably heard this before: “Goldfish are cold-water fish. Keeping them in warm water can harm them.” But is that really true? Today I’m going to show you the actual evidence that will show you the ideal goldfish temperature range for your water, depending on the kind of goldfish you keep.


Because goldfish are cold-water fish, they generally should be in a pond that is shaded. If you live in a very cool area, however, direct sunlight may help maintain pond temperatures. Goldfish do not need substrate, but substrate can add to the pond's appearance and provide a good location to plant pond plants.


Goldfish instinctively begin producing when the winter water temperature starts to rise in the spring. If you intend on breeding your goldfish, you will need to replicate these water conditions. Start by slowly lowering the aquarium water temperature (no more than 2ºF per hour).


What’s the Correct Water Temperature for Goldfish? The first thing you need to know is what the correct water temperature for goldfish is. This isn’t as simple an answer as it sounds, however, as they can live at quite a range of temperatures, depending on the variety and what they’re used to.


This means that goldfish are at the mercy of the water temperature to regulate critical body functions. For example, simple functions such as locomotion are affected by water temperature. Goldfish in cool ponds move more slowly than goldfish in very warm ponds. Fancy goldfish in water that is 50 degrees Fahrenheit are almost catatonic.


In terms of a minimum temperature, goldfish can survive in water that is close to freezing, however, you should really keep your tank temperature several degrees above this in order to encourage strong growth. The most important thing is that your tank temperature does not change suddenly.


Goldfish may only grow to sexual maturity with enough water and the right nutrition. Most goldfish breed in captivity, particularly in pond settings. Breeding usually happens after a significant temperature change, often in spring.


The best temperature range for most Goldfish is sixty-eight to seventy-five degrees, and some breeds prefer even warmer temperatures. So, what is the ideal Goldfish water temperature for you? Goldfish are exothermic, like all fish. Their body temperature is determined by the temperature of the water.


It’s September now and are you checking the water temperature of the pond when feeding your goldfish?You need to start checking the temperature as you should be now feeding your pond fish a wheat germ based food as it’s easy to digest.You need to stop feeding your goldfish a high protein food like you did in the summer.


Okay, goldfish are not COLD water, they come from areas with VARYING temperatures. I am really tired of hearing over and over that goldfish can’t go with other fish because of temperature, goldfish thrive in the 70s. The ONLY reason a pet goldfish life span is shortened by temp is because they don’t hibernate for 6 months out of the year!!