for the most part, unless the
SH tries to hitch to it, or you happen to have a tail-dragger, anything is more or less safe. the thing is,
SH will try and hitch to pretty much anything, so you need to be mindful of what you add.
the real problem isn't necessarily the sting itself, but the secondary bacterial infection that is almost guaranteed to follow. we've had cases where the sting of an appie has killed adult
SH due to infection.
zoos are generally consudered safe, but palys might be risky. smooth
shrooms are safe, but fuzzy species(Rhodactis, hairy Tongans) can and will consume fry and small juvies.
LPS is pretty much out except for Tubastrea and Fox corals.
most softies (ours LOVE colts) and gorgs are great, but
SH tanx are low flow, so you'd need to put the gorgs in a high flow area. i've also heard of
SH liking gorgs so much, they kill them with repeated hitching.
HTH
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