Quote Originally Posted by alpine View Post
The Best place for a heater in a bare tank for discus is at the bottom of the tank ( high percentage water change) . Split the wattage between two heaters (don't ask me why )

Roberto.
The rationalle is that if one heater fails, you have the other and the temp wouldn't plummet. And if one heater sticks on, you would only have half the heat going full blast, more likely you would not lose the discus over it.

Best regards,
Harriett