If I move the sun polyps further into a cave, is it unlikely that the Acans will follow? I figure since there is no light, they will not grow into it...
Acans are pretty agressive, Acan echinatas are just crazy agressive. My Acan Echinata needs to be 5"+ from anything or it sends out stingers and devours anything it touches. Even if you get the coral before it is totally gone many times you can't even save it.