Zoinks... I dunno if I should've replied to this thread... it must've jinxed me or something.
Woke up this moring to see that once again, my hammer had brown jelly...

So, after dad's day breakfast we took a trip over to PetCo and bought some Seachem Reef Dip (an iodine mix) and dipped both the hammer and the pagoda which was showing some signs of the jelly coming back.
Hopefully they'll pull through... luckily (I think) the hammer got the goo on a solitary head, where it wouldn't contaminate the rest, so I think I may be safe even if that head disintegrates...
I hope you have better luck with it than I have so far.