And in this corner....

[Silverfish]

Thanks Pocilipora, that was an interesting thread on RC. Thanks Jamie and Seaquest for the replies.
It looks like the acro has won, and the monti only got it's tip burned off a bit, nothing major tho.
I think that I will frag the corals that grow within striking distance of my favorites and let the cool ones just keep on growing.
I have to agree with Jamie that the a. millepora seems to be a tough customer. I have one in my tank that belongs to Adam, (it came form Jamie's tank) it has grown to four times it's original size in a few months BTW! It is about 1 1/2" from a small acro frag, but it seems to have been stinging it. Time to move it a bit! ;)

Anyways, pretty cool stuff I must say! :D