I have a chocolate cichlid who i've had for about a year now who has current stopped eating and only hangs out at the top of the tank. I have changed nothing in my routine and tank. The levels are low Ammonia 0 nitrite 0 nitrate less than 10ppm. The ph is about 6.8 (hasn't been higher in at least 4 months). I do my water changes once a week at 30%. All i see on him is what looks like a dust or something, like the slime is peeling in very tiny areas and also very very small pin holes in his head (not sure if it's hith, it doesn't look like it to me but idk i've never had this problem). Any ideas or help would be appreciated