Tropical Fish Forum

Tropical Fish Keeping Help and Advice => Fish Health => Topic started by: stephen75 on March 03, 2013, 06:36:48 PM

Title: red mark behind gill
Post by: stephen75 on March 03, 2013, 06:36:48 PM

I have just purchased some corys yesterday and they are all very active and have settled in well, while feeding them i noticed that one of them seems to have what looks like a wound behind its gill. He is very active so i thought he may have injured himself if so do i need to trest it with anything or is it an indication of some sort of illness?

Title: Re: red mark behind gill
Post by: Sue on March 04, 2013, 09:05:38 AM

If the fish is behaving normally, I would not use any treatment just yet. Water changes are usually the best way to treat wounds, so I would advise to do more water changes than usual while the cory is showing symptoms. Keep an eye on the cory, and if the red mark changes for the worse, that is the time to treat, once you know what to treat for.
Did the cory have the mark when you bought him, or has it appeared since? I wouldn't put it past some clumsy shop worker to have damaged it with the net. Do you have any fish that could have attacked it? Cories are totally non-aggressive so it wouldn't be another cory but it could be another species.