These torches are stressed and no need to iodine dip. Location plays a part here. Torches do best at mid to upper third of tank where it receive best light and flow. Sand will quickly irritate them. Some stressors for them are:
-Elevated phosphate
-Too much current which subjects the polyps to tearing off the skeleton
-lack of feeding
-Light too intense
This is a photosynthetic coral which has a relationship with its zooxanthellae that lives inside its tissues that converts the light into energy which in turn feeds it. Mysis shrimp is a good food for this type of coral. Its best to place a torch
where it gets moderate flow and moderate-medium intensity lighting. Also assure the calcium is no less than 390 for skeletal health which is important.
I keep my euphyllia and lower at mid-tank