I checked the temp on the tank when I got home. The heater was set at 80, however they don't work when they aren't plugged in! I reset it to 76 and plugged it in. I don't remember unplugging it, but oh well. The actual temp when I checked yesterday was 67. Might explain why I wasn't attacked so much on the last water change. Water is back up to 76 this morning and he seems to be happy and full of attitude like usual. Taking out his attitude on the heater again. Good thing it really is indestructible.