Flame Hawkfish & Inverts...?

[Inushnu]

I just got a Flame Hawkfish and was told by my LFS owner that it would be fine in my FOWLR 55g tank. I did research on it beforehand and so I got it but THEN I did a bunch MORE research and started to find that this particular fish may eat my hermit crabs and cleaner shrimp.

Right now the crabs and shrimp are fine and I'm keeping the Flame well-fed but I'm worried. I like my little inverts and want to get more.

Who has experience with this fish? Should I move him to my 25g FO (no inverts) tank? He's REALLY active all over the 55 and it pains me to think that I may have to put him in a smaller tank but, ugh again, I love invertebrates!

Any ideas, suggestions, knowledge, etc on this fish/issue would be greatly appreciated!

Thanks!