I can't really tell from the pic but is it his beard you are talking about? The thing that pops out when they flair..or is it actually his gill that is sticking out?
Is it like the pic below? If so, that's normal. If it is his gill - I'm not sure what would cause that.
Is it like the pic below? If so, that's normal. If it is his gill - I'm not sure what would cause that.

Not sure if it would affect his gill but I would suggest using a water conditioner. It's not only chlorine they remove - It's also heavy metals in the water as well. some also remove ammonia and nitrite. Any fish water conditioner will do. I like stress coat but a lot of people use seachem's prime. There are plenty of others to choose from as well.