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Moreover, can a goldfish live in a heated tank?
Yes, a goldfish can stand warmer temperaturestemporarily (when they're kept in a pond during summer months). Butthey won't feel comfortable kept in warm water all the time. And ifyou try keeping tropical fish in cold water, they'll just becomelethargic and refuse to eat.
Thereof, do ryukin goldfish need a heater?
Ryukin Goldfish are among the hardier species ofgoldfish. They can do well in goldfishaquariums or even ponds as long as the environment is safe andtheir tankmates are not competitive. Many people will keepgoldfish in an aquarium with no heater orfiltration.
Proper Water Temperature Goldfish thrive at temperatures between65 and 72 degrees Fahrenheit, which is roughly roomtemperature or slightly below. When temperatures aretoo high, goldfish may become sluggish and overheat.At temperatures below 60 degrees, they may stop eating orbecome lethargic.