I recently lost a johanni (no idea what killed him) and so I've really been scutinizing my other fish and noticed something recently.
My yellow labs look like they have coal dust around thier mouths and over thier gills. It's not individual specks, more like a smear of dirt. Almost like a 5 o'clock shadow. They seem to be acting normal though.
Also, my red zebra has something around his lips(?). It looks like wood particles from him eating algae from the driftwood in the tank (which it may very well be). He's acting normal also.
I asked one of the fish people at the lfs
and he of course recommended salt as a first treatment. Currently I haven't added anything.
I checked a few sites about fish disease and saw no pics/descriptions that mimic what I am seeing in my tank. Does anybody have any ideas as to what this is?