I'm excited for you. I saw a beautiful cowfish at a local LFS and he was so sweet and docile. He allowed himself to get pet, even. I don't think I'm quite up to that challenge yet. But good for you!

Yes they are more specialized in many ways. I did not think of my powerheads or the cleaner wrasse. They are slow swimmers although they cut the water flow quite well. They need to be target fed, well at least right now he needs it. My guy eats from my hands but his frontal vision is to be desired... he nipped me by accident and it hurt.

I knew what I was getting myself into for the most part. I just did not think about cleaner wrasses or powerheads. I am glad I was able to put him into QT and deal with the issues at hand, no matter what a PITA they were.

He is showing no stress but with this type of fish it is hard to tell. They don't breath the same way and because their gills are on a hard body I can hardly see them moving. All I can do is watch him like a hawk, and try to figure out how to target feed him pellets. I know he will eat them from my fingers, but they are too small and the accidental bites do hurt.

If he's quick enough to catch them as they fall you could just put the tips of your fingers in the water, releasing one or two at a time at the same place every day. Just turn off the PH's beforehand and he will learn to come to that spot to eat.