It would be nice if you can find a proven reef safe fox face. I have one and the bubble algae is kept away nicely after adding him(her? -never asked the fish about preferred pronouns)
Same story with filefish- some eat glass anemones while many don’t. They may eat lps or not and they don’t come with any long term guarantee.
Ive torn apart my tank to catch Flame angelfish, filefish, butterfly fish and others when their appetizer choices changed.
I have also observed posting behaviors and like me people will chime in when they want to warn others a lot more reliably than when they are not alarmed. This could bias this poll on the Devil Foxface towards the caution side. That said, I’d get one if you like them. They do have a good track record for being reef safe in my experience. If I am wrong I can’t help you catch it but I can tell you how easy fish are to catch after you drain the tank.
hth. Just wanted to tip the scale for you.