Looks like I may hvae had an AMM spike. I am mixing a bunch of water now (I went out and bought a trash can for it)
I put the clown in the QT with the blenny who has been in for 2 weeks and seems OK. I expect that my clown didn't have anything contagious (was the only fish in the main tank) so I am not too worried about the blenny. Worst case, they both get something brought in by the blenny, and I have to treat the QT.
I will do a 50% WC
on the main tank (which is inverts only now) and then probably move both fish back into the main. Worst case at that point is that the blenny comes down with ich and I have to pull them both again for a hospital treatment
My thoughts basically were "how can I give the fish the best environment ASAP" and so into the QT he went. I'm just crossing my fingers now