A lot of those frags aren't encrusted. I personally try not to buy sps frags that aren't encrusted from the start. IME, they do much better!
What us the flow like and what is the par where they are at in your tank? Also, how old is your system? SPS like mature systems.
What us the flow like and what is the par where they are at in your tank? Also, how old is your system? SPS like mature systems.