Yes, it will move around to try and find a spot it likes, it may never stop moving if it doesn't find a good spot that it likes. Usually high light, and medium or moderate flow. I have a BTA, stayed in one place for a year, then I changed up some of my PH's, and it started moving around and killing stuff, it now resides in my refugium under PC's. It is only like 6 to 8" from the light. Oh, I ripped it in half trying to remove from DT, now I have two. My clown was not happy when I took his home away. He has since found a new area to host.