I have a Flame Angel enroute to me tonight to go into my mixed reef after a month of quarantine. I will use the month, maybe longer, to make sure the angel eagerly feeds on frozen foods. Hopefully, it will leave my precious polyps alone or at least, be moderate about it.
From what I've read here, there and everywhere: "You pays you money and you takes you chances"
The only real definitive to your question is..NO
But that ain't stopping me from trying.