Shevalik:
I dont think anything is fatal, its just how much you want to do to bring it back
If I were you I would dummy the bath back to the way it should be. You have a lot of metal from the dummy in the bath now, so you will have to dummy it the right way for quite a bit now.
Scrub the anodes clean prior to dummying though.
Filter the bath through a coffee filter to get the grunt out of it. Your probably going to have to get some new anodes after your done dummying because you will eat them up.
Hope this helps.
48 Buick