Okay so this morning I check o my fishies as usual to see if they are okay and I notice this fungal looking growth thing on one of my cories. I know the other day one of my cories was losing color and then came back after I did a simple water change and now I'm seeing this. I mean he's eating good, and lately very active and schools with my other three. He's eating now as if it' not bothering him one bit. Can you anyone help. He's living in my 10 gallon with 3 other cories. I have a spare tank to separate him in case its that.