I had a heater malfunction last summer while I was at work. I have AC so I continued to use heaters in the summer since my apartment was probably around 70 degrees, which without a heater would put my tanks at 65 (since water is usually 5 degrees colder than the room).
Anyway, while I was at work one of my older heater's malfunctioned/broke and started to heat the tank like crazy. I'm not sure what temperature my tank go to since at the time my thermometer when to 90 and it was showing a reading of 90 so basically who knows how hot it actually was. I came home to find my fish darting around the tank like crazy and panting. I quickly cupped her to get her out of the tank and put your cup in one of the tanks that was at 80 hoping to slowly bring her water down to normal.
unfortunately, she didn't make it through the night.
Just Keep Swimming
your fish are your responsibility; there are no excuses to why you cannot provide for your fish.
Bettas : Stella, Sebastian
Nerite Snail: Cedric