12/25/2023 0 Comments Best goldfish aquarium vacuumsMany of these fish are more often seen in tropical tanks, but they can thrive in an aquarium without a heater, provided that the room temperature doesn’t fall too low and remains relatively consistent. Now that you know a little more about coldwater fish species that can thrive in a home fish tank let’s take a look at what different types of fish you could choose to keep. 31 Best Fish Species For A Cold Freshwater Aquarium Thanks to their origins, most types of goldfish and their relatives, Koi carp, can be kept successfully in outdoor ponds, surviving the cold of winter by hiding away in vegetation and the warmer depths of their habitat when the surface of the water freezes. Other cyprinids include common carp, Koi carp, and minnows, all of which are coldwater fish. Prussian carp are found in all the world’s temperate zones, although they originate from the chilly waters of Siberia. Goldfish are members of the Cyprinidae family that includes the Prussian carp from which all varieties of goldfish are thought to be descended. The most commonly kept coldwater pet fish that you see in home aquariums are goldfish. As far as aquarium fishes are concerned, coldwater species prefer water that is typically around or below 68° Fahrenheit.
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