Clown With white cotton looking around gill

[Hirobo]

My poor clown has what looks to me cotton next to his one gill. He doesnt seem sick eats swims and seems happy but I am concerned. Can someone help me identify this? I would like to make her better, but not sure how to treat it

 

[mott768]

try using some garlic extreme on the food.

 

[Hirobo]

Ive been since you told me to it looks healthy