New Corals coming : Tank Positioning and Care Questions

I like epoxying/gluing frogspawn to a rock personally.

As for aggressiveness acropora are on the low end IMO. They will not extend any aggressive tentacles/mesenterial filaments very far from where they are physically, you just have to be careful because of their growth form you need to give them at least a few inches to grow into a semi-full colony before you have to start worrying about fragging it back.

The frogspawn is what you need to look out for, if they get the itch they can extend tentacles much farther than they normally do over the course of the day, they also can have a pretty potent sting. I've never seen mine do it in my tanks but I've seen it at fish stores when the frag tanks get packed tight.