Encrusting Porites growth control

[VJV]

Hi everyone, I have a encrusting green Porites that for sone years grew relatively slowly but now it has taken off and I am concerned it will smother my acros further up on the same rock.
Being an encrusting coral what are the best options to keep it from getting to the acros? The rock is ceramic so chiseling is not easy.

Thanks!

 

[VJV]

 

[OREGONIC]

Kalk paste, or F-aiptasia.

 

[VJV]

Kalk paste, or F-aiptasia.

Thanks!

 

[selma37042]

Just got one looks like a 5cent size. Does t grow like a Zoanthids