Well my heater busted its thermostat this past week (normal temp around 81F ended up at around 94F) No deaths had occurred at this temp, it had levelled off at 94F and I was just starting work week (I work 10 hour shifts - 7:30pm-6:00am) so couldn't replace it til my days off...got home on my "Friday" (Sunday am) and checked tank temp...was at 97F and climbing - heater was still glowing red at this temp! And so many corpses...all my corycats, all 5 neons, 3 tiger barbs, 2 harlequin rasboras....forget fishing out corpses with a net - I'll use gravel vac hose (pull off big end so hose gets strong suction). It's weird that the otos are not affected...still 3 lively little brats...I unplugged the heater when I saw the death toll and will be leaving to get a new one in about 10 minutes (yawn....been up 19+ hours so far)...will look for some new fish (tiger barbs x 3 for sure!) on Tuesday after tank corpse removal/water change completed...sigh...poor little corycats...just had to share my little sob story with y'all...stupid nightshift job... 
