Copied and pasted from the duplicate thread.
"Isolating encrusting montipora corals is the key.
Once they become established and start growing, they're almost impossible to stop.
I had a small frag of M. hoffmeisteri that was a slow grower so I placed it near another frag. Once it became established, it started growing like crazy. The encrusting montipora completely covered the nearby frag of M. spongodes and wiped out.
I really like my coral too, but I am keeping a very close eye on its growth and frag it as much as I can. (The coral plates out over the zoanthids that are next to it so I'm able to snap off the growth.
Your best plan of action is to chip away the coral and rock from where you don't want the coral to grow towards. If your able to remove the plate, try attaching the plate to a small rock that is movable or isolated from your other corals."
Here's a picture of my encrusting montipora after it completely covered a M. spongodes.
At least there's a nice form not normally found with encrusting corals!
