How can I stop encrusting corals from spreading?

[Freddie83]

I’d like to stop the encrusting coral to the left of the arrow to get any closer to my stratospheres. Any ideas on how to make it stop growing or even better, pull back a little without hurting my zoas?
Thank you!

 

[jda]

Kill the edges with kalk paste in a syringe or put some 2 part putty over it.

 

[The_Paradox]

Super glue or frag it back. From my experience it’s usually a losing battle though. In most cases mine stop at base of zoas but in a few cases I have had monties grow right over zoa colonies.

 

[Freddie83]

Kill the edges with kalk paste in a syringe or put some 2 part putty over it.

That’s a great idea. Thank you!