Flagfin Angel in a reef?

[Powertec]

We at one point had a Regal angel,flagfin and a potters in a sps/lps reef. All can be hit or miss. All was good untill we got Vibrio in our tank and it wipped everyone but the flagfin out and when i pulled him out of quarintine he then decided to eat my clams and my lps. So he had to be removed.

So yes it is hit or miss. I now have a regal angel in my reef and knock on wood so far so good.
I found i would feed them more in the thinking they will be full. The had mysis once a day and 2 algae sheets