I know Im a saddo, got quite attached to the little thing though 
Only had him a couple of weeks, he looked a bit unhappy a few days ago and Ive only been doing partial water changes so thought "I know what will cheer him up, a nice clean tank" so I put him in a bowl, cleaned all the tank, filter, stones etc. Slung him back in and he looked quite happy.
This morning he was found on his side at the bottom of the tank, dead as a really dead thing. Took him out by hand to check for signs of life. Nothing.
I feel so guilty, I dont think the water change is 100% to blame as he clearly wasnt right but it probably sped it up somewhat.
What am I going to tell DS? He hasnt noticed yet 