have you got a link to the neon thread?
I raised the issue with the fins at the end of that thread, I had set up a new post but a mod deleted it and merged the two togetherWhite lump on Tetras mouth...
So I've moved my fish to a new tank today and in the process noticed one of my tetras has a lump on his mouth (see photos). He seems otherwise fine, is swimming naturally with the others and doesn't seem especially bothered by it. Any ideas what I'm dealing with?www.fishforums.net
So from what other fishes ? Neons ? Harlequins ? Shrimps ?Moving the stressed one is a good idea but it may not necessarily purely be from the other males