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Hi Dr. Stafford,
The spot is on the flap of the gill --- not in or on the opening of the gill. So I guess that would be the gill covering. It has not gotten worse or better since this morning and it is now 10:13 pm (e.s.t.)
Thanks for helping me with this.
Since this is a goldfish, I can't see giving it a baytril injection.
I have Melafix antibacterial fish remedy which i already added to the tank water.
It says to does once for 7 days - then change the water.
I recently added water to the tank and think this may have caused the red spot......however I did treat the tap water with a water conditioner as I always do.
The spot is the same as yesterday (not worse, not better).