coralline is a hassle. It's pretty on live rocks and all but when it starts to grow on your front glass and you have to clean it off every other day, you'll be starting a thread about "how do I stop coralline growth".
I guess it doesn't really matter though, as long as you do normal tank maintenance you'll have more coralline than you know what to do with. I know people say it's a sign of a healthy tank, but it stinks when it starts to get out of control.
Just let it be. Don't open the can of worms................ I thought I wanted it one time to, now I have to litterally scrape it off the glass 3 times a week while getting bittten by a clown fish because I'm to close to his leather.