Daisy polyps on glass?

[Adiantum]

I want a soft coral to grow on my back glass, and I am considering daisy polyps. Are they controllable like GSP? I want a good grower, but nothing invasive like blue clove or Xenia. These guys are pretty and I've seen mixed reviews of them; some saying they can be invasive, others, the opposite. I'd like to try them but only if I can keep them contained on my glass away from the main rockwork.

 

[Sharkbait19]

IMO daisy polyps are less fast of growers, and GSP and Xenia are gonna be better glass corals. It would be quite difficult to contain them though IMO. Xenia is the easiest to pry off of places though.

 

[Adiantum]

I don't mind if it takes them time to gain coverage. I'd rather slower growth than have something trying to take over constantly.