Temperatures above 85 degrees F can stress goldfish (especially fancies). Now if you’re keeping goldfish outdoors, or you’re experiencing a heatwave, you may need to cool down your water. How do you safely lower my fish tank’s temperature? If the water gets too warm though, it can cause the goldfish more stress and leave them susceptible to diseases. The warmer the water gets, the less oxygen it holds. You’ll want to make sure your water is well oxygenated once the temperatures break 85 degrees F. Typically, when grooming a fish, breeders will raise the fish in warmer waters to help speed up their metabolism and growth. Instead of slowly growing over a 3-5 year period, most of their growth can be upfront within the first 6 months of their lives!. Warmer water and faster metabolism can result in a shorter lifespan for your goldfish.
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Sounds great doesn’t it? There is a downside though… Is warm water dangerous for goldfish? They can digest food quicker and grow quickly. When the temperature hits the high 70s and breaks into the low 80s, goldfish have a faster metabolism. If you’ve ever seen goldfish farms in Asia, they raise their goldfish in tropical climates. Goldfish tend to thrive in warmer temperatures. Common goldfish don’t have much of an issue with hibernation, but fancy goldfish are much more delicate and may not survive the colder temperatures. When goldfish begin their dormancy period in colder temperatures, you have to avoid feeding them as it can harm the water quality. As ornamental fish, they don’t handle either extremes very well. Suddenly increasing the temperature to get them out of this can also be extremely dangerous and often fatal.įancy goldfish are also more fragile when compared to the common types of goldfish. If the temperature dips below 60 degrees for a period of time, goldfish may start to hibernate. While you always hear that goldfish are cold water fish, there’s a limit on how cold it should be. Now I like to keep my tanks around the 76-78 degrees range, but in the summer months, it can go up into the 80s.
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Slower metabolism means that they aren’t digesting their food as quickly anymore which can lead to food rotting in their stomachs if overfed. When temperatures dip below 60s, their metabolism slows down and they may be dormant or even hibernate. Letting the temperature drop a bit during the winter months, when your house is naturally colder, and letting it rise during the summer months can help trigger breeding behavior. Having mild fluctuations in temperature based on the season can also help stimulate a natural climate for goldfish. This is a moderate water temperature that isn’t on either extreme ends. The ideal temperature to keep a goldfish tank is typically around room temperature (68-76 degrees F). What is the best water temperature range for goldfish? Common goldfish tend to be hardier, while fancies are a lot more delicate. While goldfish can definitely survive in cooler temperatures (60 degrees F), that doesn’t mean that it’s the optimal goldfish water temperature. You’ve probably heard that goldfish MUST to be in cold water.