It is never fun finding a fish dead, but they all react to stress differently.
I have found that certain types of fish have a harder time than others - you try your best to provide the best environment you can but sometimes there are just weaker fish or those who don't adapt to new surroundings well : (
46 gal fw tank with black skirt tetras, neon tetras, spotted corys, cherry barbs, otoclinus, snails & 4 amano shrimp - plastic & live plants
5 gal QT
Remember: Our job is to take care of the water our fish live in