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My tsn has developed what looks like a very light layer of film over its snout and on a small part of its back, it almost looks like fungus. The fish seems unaffected, and acts normal but i am woried about it. Their was a very slight trace of amo when i tested the water today the rest is fine, the amo was taken care of with a W/C. What do you guys think it is and how can i treat it?

Could it just be mucus (as a reaction to the ammonia)? In which case, the water change would get rid of it.

It doesn't seem that way. But possible. I will keep a close eye on it.

I did two large water changes and he is looking alot better 95% of the "white stuff" has dissapeared.