You should ask if the SPS can survive the stress?
I got 1 millepora colony that had a bristleworm living in it. For one year no polyps extension and nothing happened to the colony, no growth, turn brown, couldn't color up.
Until Scarab pointed the polyps extension (which I didn't take note of) I look closely and after cutting the colony up, I removed the bristleworm and now it is coloring up and showing lots of growth.
So the question is whether you want just barely surviving SPS or thriving SPS.