Hello,
My Cory Catfish has been acting strange lately… He has been hovering in the middle of the tank and staring at the glass. I also noticed that his color appears to be a little redder than usual, and his barbel seems to be missing. I just noticed this tonight. The whole tank has been happy and healthy for a few months and we haven’t had any problems up until now. It is a 10 gallon tank with two Corydoras, two X-Ray tetras, one guppy and two snails. The ammonia levels are normal. Any idea what might be happening and how I can fix it? I attached a picture below