Coral ID please

[BigBabich]

Goniastrea? Acan (whatever that means these days)? Favia?
I'm just wondering how much it'll grow and how far away from others I should put it.
Haven't seen any sweepers as of yet, I bought it the same day as a chernobyl Coelastrea and that thing is sweeper city.
Thanks!

 

[fishski13]

That is an Acan, lower flow and lower light, doesnt have any sweeper tentacles and likes to be fed meaty food

 

[thamnasteroid]

Micromussa lordhowensis