well from what i have read if they just get near it the coral will already be stong. but some corasl are better at takeing it then others. i know my lta had been right next to zoo (he was ontop of them for a few hours) and right on some mushrooms for a day and they are still doing well. he has also past buy some leathers a few times but nothing has really shown and damage by him. but the lfs
said that the xenia would take a big hit if he got too close the them. he also said that when his rba got with in like 3 inches of his acroproa frags
they had already been killed. so it is really up to the coral. some are better at takeing the sting then others.
A 46 gal
bow front (Soft coral) reef tank with a 10 gal
sump. And a 30 gal
and Clam) reef tank hooked up to the sump of the 46 so they share water.