I'll grab some Furan 2 for the med cabinet
The spots were MI, so I started Hypo
I don't understand why you said
'In the future, hyposalinity is not a good method of treatment for fish already showing spots'
unless you are referring to the Orange-back with the white-ness on his head
It looks like the only Formalin I can readily get my hands on is ParaGuard, which I don't place much faith in
I'm going to upload a vid of the poor dude ...