How do zoas spread?

[nanocube24]

I am looking to get them to spread to different rocks. What needs to happen? What can I do to help them along? :notsure: :notsure:

 

[reefiness]

if you make one rock touch the rock they are on within a few months they should be on the other rock

 

[nanocube24]

So it's that easy? Right on!! Thank you!