Ugh, so, I get to deal with this today. My female Watanabe Angel has what looks like an injury above her eye. Yesterday it looked like a fresh scrape, and today it looks like a few of the scales are missing to reveal the white flesh. She's eating well (such a pig) and is swimming around normally. Ocassionally she will shake her head, but that's the only weird thing we've noticed. I was worried it was maybe LLE (lateral line erosion) (aka hole-in-head), but it was a sudden onset. We feed a variety of food...changing it up daily almost. We use a mixture of shrimp, clams, oysters, R/G/B algae, garlic, etc then alternate that with Spectrum II, cyclopeeze, and other pellet food. The only other fish are 5 chromis (so no one to pick on her). We also haven't run carbon on the tank yet, so I don't think the carbon particles could be attributing to the LLE (if that is what it is).
My conclusion is that it is simply an injury from a rock. Any other thoughts? Will a fish injury normally heal itself fine, or is there anything additional I can do to speed her recovery? Would a cleaner shrimp help prevent infection?