The average temperature of a freshwater biome, also known as a biotope, depends on the environment that is emulated in the biome. For instance, according to Aquatic Community, freshwater Amazonian biotopes on average reach temperatures of 74-78 degrees Fahrenheit.
On the other hand, Practical Fishkeeping advises that freshwater Taiwanese biotopes have an average temperature of 64-75 degrees Fahrenheit. No two fish species are exactly alike, and no single range of temperatures works for every freshwater biome or biotope. Instead, it is vital to research and match the aquarium temperature with the species that inhabit the ecological environment emulated by the biome.