A dying fish... to flush or let it pass first?

[Nikki2ol6]

I believe one of my fish is dying. It lays on its side for a while then it's up swimming about again. I have placed it into a trap and it will lay on the bottom most of the time but if I go near the tank he will get up and move around. I have put some food in but he is not interested. If I put him back into the tank he will be attacked and killed as my fish are like that! I'm unsure if he will get any better or if he will die soon..... so my question is would you remove him and put him out of his misery? Or let nature take its course in the trap?

You should have a bottle of clove oil on standby for situations like this. I cannot believe you've even thought of flushing - it's just torture. The temperature wouldn't kill him (fish are capable of withstanding huge temperature variations in the wild, even in the tropics they might see 10 degree swings or more on a daily basis), so it would be a long and slow and chaotic descent through the sewage system before he finally gave up. Awful. Not to mention a problem for your water company.