Signs of cyanide caught fish

[24storm]

Can anyone tell me the signs to look for in cyanide caught fish or links to articles about it. All i can find are articles telling you not to buy cyanide caught live stock but how would one know.

Also how long does it take to show up are we talking days weeks months?

If the fish dies is there a way you can tell for sure it was cyanide poisoning?

If in anyone has any good links for anything to do with cyanide poisoning can you post them up please. I am trying to do some research on this so a person knows what to look for.

All my fish are healthy but i have lost things in the past and would like to know what to look for so myself and others can maybe avoid this trouble.

Thanks Keith