Help with coralline control please !!!

[Lesley]

HI, I have just noticed this morning that Coralline is starting to encroach over some of my corals skeletons ?
My Trachy particularly seems to be a problem although some others as well.
I have got some amazing plating coralline which I like the look of, but not if its doing this.
Any suggestions on how to remove from coral skeletons, will it become a problem and take over completely or will the coral be ok ?
We have noticed that the trachy doesn't seem to open as much as he used to.
P. S these photos taken as moonlights came on so you could see the skeleton.
I am having to clean it off the glass constantly, what can I do to stop it growing so fast ?

 

[Diesel]

That's awesome bro.
But if you want control, get a urchin or two.
They will take control.

 

[Lesley]

That's awesome bro.
But if you want control, get a urchin or two.
They will take control.

We had one of them and he did a great job of eating it, but in all the wrong spots. If I put him on a leash & could direct him it would be fine, but I don't think that would work.
Is it going to kill my Trachy ???
How can I slow it down ?