It was going from 80 to slowly creeping to ninty. I've unplugged the heater and plan to keep it off for an hour or so. I reacted on instinct because he was acting so hyper in it. I read once that if the water is too cold they'll be lethargic and too warm and they'll be too hyper.
I don't want to lose Akira! Please someone help me!
EDIT: It dropped to 81 and my mom had me switch heaters from the other tank.