A few days ago I bought some new cories and tetras. I just realized that one of my Corys has a big bubble on its head. Does anyone know what it may be or how I could/should treat it? The cory is still very active, and it doesn't seem to act like anything's wrong, I just want to make sure that it is not some disease or something! Thanks!
PS I am posting a pic too! It may be a bit blurry.
1-put him in a Q-tank
2-re post on the main disease forum so more ppl. will see it.
have your water readings, and all info. up to date. You could try a broad spectrum antibiotic. Make sure the q-tank is heated and has good aeration.
Glad to hear it is doing ok...I read this when you first posted, and didn't have a clue, so didn't answer...sorry, it feels lousy when no one answers.....
Maybe he got hurt , something hit him there?
Glad to hear he recovered. Afraid i didn't see this post till now, not that i'd have been able to shed any more light!
So glad your fish is doing so much better. 
