They are on a single frag plug that isn't attached to the rock, I can easily remove it and move it wherever. The problem is that the palys are mixed throughout the zoas, I worry that if I cut them, the dying paly may poison the water, but if I leave them, then they will certainly kill the zoas.
My plan atm:
1. Remove the frag plug from the tank and put into small container
2. Use a small blade to cut the palys off as much as possible, but this will still leave paly parts that could grow back or (as I understand) poison the water
3. Throw out remove palys
4. Put plug back into tank