If conditions are good in a tank, it is possible for sps
to recover. I had a power outage that literally murdered many of my sps
in the fall. I never got around to removing the skeletons, and I'm glad that I did. I had a purple na na
acro that I thought I had lost. I picked it up and turned it around before removing it, and there hidden away was a small chunk of tissue clinging to life. It is still currently recovering, the chunk of tissue has doubled in size since then. If an acro can make this kind of recovery, an easier to keep birds nest can do it as well. Just keep parameters in check and a good amount of flow, it'll come back for you.