The decorator, ugly little crab, can be destructive to a small extent. They basically place live creatues on their backs. Small anemones, polyps, zoos, etc. They do it for camouflage, not to eat, or kill. Now, how these stick on the back so easy, I don't know.
Maybe I'll do a 2 actinic configuration instead of just the 1 I have now. However, I did try that 1x and the tank looked too blue. My options are limited because my lighting fittings is for 46" and there are only 3 type bulbs that come in that size.