I am thinking of picking up two frags of Aussie elegance, one the green with pink tip morph, and the other the blue-ish with blue/purple tip morph. Two questions: (1) Can they be placed within stinging distance of one another? (I know elegance corals are strong stingers with long sweepers - but will their stings harm other elegance corals?) and (2) Any differences in care, survivability, or anything else in the two morphs?