Try posting this thread in the disease & health forum,I apologize for the foggy picture, water change.
I noticed the one side of his mouth has a red discoloration. Any insights?
He's acting normal
View attachment 1243507
View attachment 1243508
If that doesn't look better in a few days he might have a bacterial infection often referred to as duck lips. For now I would put some API Freshwater Aquarium salt in the water and hope that it heals. Duck lips require an antibiotic.