Foxface skin disease?

This greyish patch seems to be spreading wider and wider. The fish is acting fine otherwise.. what's going on? :-X

 

The ones I've kept over the years seem to get skin issues. Your pic reminds me of it scraping on the rock if it gets frightened. Mine were craaaazy when they got spooked. I always keep Stress-zyme or Stress-Guard or whatever to help heal their skin. Try it out.

 

Maybe nocturnal coloring?

 

Hi , Do i just use stressguard for one time or dose it everyday? how long does yours take to heal?

 

Nope it is not nocturnal coloring , the foxface becomes sorta like a zebra when it's in noocturnal mode

 

I think I would dose every other day for a total of 2 doses. If it doesn't completely clear up dose 1 or 2 more times.