![]() ![]() Apparently no discus died since the paper reported no fatalities. ![]() Sciaenochromis fryeri OBĪnother study took a large number of juvenile discus from 28 degrees Celsius (82 degrees Farenheit) to 14 degrees Celsius (57 degrees Farenheit) at a speed of one degree per hour. Only 20% of the corydoras perished (“Effects of salinity on distribution, growth and survival of three neotropical armoured catfishes”, (Siluriformes-Callichthyidae)”, Jan H. The temperature went down to 57 degrees Farenheit (14 degrees Celsius). One study on three species of Amazonian corydoras has the building heat go out inadvertantly. So the idea that ANY tropical fish “requires” 79 degrees (26 C) or higher at all times is simply hogwash. He points out that fish farms in South Florida routinely hit temperatures of 65 degrees Fahrenheit (18 C) in the water of the ponds for extended periods of time (days) and the fish are fine.Ĭory has kept community tropical tanks at room temperature without a heater for many years in his house at down to 65 degrees (18 C). Note that Cory of Aquarium Coop (bright young guy who NEVER steers one wrong!) did another great YouTube video where he explains why all tropical fish do just fine all the way down to 65 (18 C) degrees. And the “Amazon” includes some blackwater fish from Asia such as the clown loach. And the “acceptable” temperature ranges should be considered temporary excursion temperatures, not permanent living conditions. Tropical fish will die rapidly when presented with water below 60 degrees. The recommended general temperature for fish are (Fahrenheit): Water pH and Temperatureĭon’t take too much liberties with this table. In nature the temperature of layers of water vary radically and fish swim through those thermoclines with no damage. And, contrary to popular mythology, temperature fluctuations do not hurt tropical fish. Most freshwater tropical fish live quite comfortably at the temperature of most homes (65 0 to 85 0 F, 18 0 to 30 0 C). The temperature of an aquarium is much less important than hobbyists give it credit for.
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