11 Top Fish Species For Cold Freshwater Aquariums
Most ornamental aquarium fish are tropical fish that require warm water to survive, typically 72-82 degrees Fahrenheit (22-28 Celsius). However, there are some species that can survive cooler water than most tropical fish, even down to 50-60 degrees F (10-15 C). Some coldwater ornamental fish may grow so large that they are only suitable for outdoor ponds. Koi can be purchased at fish stores at a few inches long, so you might think they are good cool-water aquarium fish, but they are about three feet long when fully grown!...