sun polyp stinging cell question

[jessp]

since it seems to be the coral of the week i'm gonna ask a question about my sun polyps.

how potent are the stinging cells on these corals? I have a nice big colony that opens on a daily basis. i recently added a rock of nice zoas. this evening during feeding, they where touching slightly. will one kill the other if action is not taken swiftly?

thanks
jess