Yeah, looking back on it, I failed in not properly assessing the fish before purchase. He wasn't eating much in the store, and that pretty much violates the cardinal rule of making sure they do. I thought I could do better than the fish store (which I probably could, but still...)
Anyway, I was at the LFS today like almost every Friday and I saw the same foxface I've been eyeballing for the past 3 weeks. He's a small one, about 3 or 4", but was eating and looked fat enough. He was a little skittish, but seems healthy. I was waiting for a magnificent foxface, but the LFS has been having trouble finding a good specimen for me - so I ended up getting him. He's already out and acting bold in the tank and ate readily only an hour after acclimation. I have a good feeling about him!
Thanks for all the thoughts for Fernando. May he rest in fishy heaven and eat all the algae he wants.