Right after we placed the chalice corals, the nem split. Now the two second nem is very close to the chalice. Wondering if I should move it or let it be. Advice? They are able to touch the coral.
Nice nems and corals! You should probably move one or the other. They will definitely attempt to hurt each other, and although the stunner can be fairly aggressive with other corals, with everyday contact eventually the nem will likely kill it or at least the part of it that it can touch.
Or you can just leave it and see what happens! That's what I do far too often, lol.