I was just doing some maintenance and stuck my hand in the tank adn thought to myself "hmm, this seems warmer than usual". I busted out the thermometer and the tank was at 96!!! None of the fish seemed bothered at all but sheesh! Obviously, one of my heaters is malfucntioning so I unplugged the suspect one and did a water change, I cannot believe the sterbai and discus seemed so unphased!