I posted a couple days ago on my corals melting. Sunday while I was doing some maintenance I noticed my heater on. I turned it all the way down and watched it and the thing never went off. I unplugged it and pulled it out. Well guess what? No more high temps in tank. By the time I went to bed the temp had dropped to 80. When I got up this morning and checked the temp it was at 78, and this evening when I got home it was still at 78. I never would have thought about my heater being bad. I sure am glad we figured it out.
Has anyone else ever had this happen?