After having this tank set up, cycling, planting, and changing lots of things around over the past year I finally got discus about a month ago. Everything was going well and then I come home from dinner to all my fish at the surface breathing hard and my tanks at 89° I have this tank usually at 82° to accommodate all the fishes different temp ranges. It’s only one 500w heater so it probably went up to 89° over the course of maybe a hour and a half but I just wanted to share on here to warn about this heater brand. It almost killed everything I had spent so much time and money on. I have another backup heater that’s the same brand but after this experience I’m not going to be trusting this company any longer. Any brand or heater suggestions? It’s a 60 gallon discus tank.