Red planet STN? Help

[dcw1sfu]

So after getting back from Hollidays I noticed my red planet had STN however nothing else in the tank looked to have any problems. All parameters are perfect as well. Last night I then was looking in my tank after lights out with a flashlight and noticed my maze corals reacher tentacles were enormous possibly 6" or longer on some of them. And a couple were at times brushing across my red planet. I've since moved the maze coral now is there anything I can do for the red planet? Here's a not so great pic.