I can tell you what I would do – I would really very fast get back some normal low microsiemens and low ph water, put in whatever you have of ketapang leaves or oak leaves, or even you can get some stuff in bottles which actually does the same (not extracts which lowers the ph, but other kinds), and then I would give the paroes (and probably the chokolates as well) higher temperature for a while.
I have used temperatures at 28 with paros that I was worried about, and they normally respond really well to that.
I would not at all use any more medication (with the paros). Not unless I was definitely sure there was a positive sign of illness, and a sign I was able to diagnose correctly. Otherwise, if one fish continues to get worse, I would isolate it and see what happened. Because, normally, a sick fish with an uncertain diagnose, – you have to have a strike of luck to cure that, and most often you will end up making more disaster to the whole tank by adding more medication. Medication is really not that easy to handle, mostly it ends up having worse effects than good ones.
And most of the times, – a very sich fish is uncurable anyway. This is not to say that you shouldnt try to save any precious fish, but I am afraid that is my experience. Then rather take care that the rest of the fish, if looking well, do not suffer any by-effects of medication.
But I have said it one other time here, and will say again – always keep one of those small bottles with spirohexol, they work really well with sick paros. I had a tank with 3 fish, – they developed some kind of odinium, very heavy attack, and one of them was really bad, and I had really given up on it. But one tablet of spirohexol + one week, they all recovered.
Oh, and dont use salt.
This is my personal opinion, I have no experience with it, never used it, – and would really think it is contradictionary to the waterconditions that paros demand.
One question : are they all still in the same tank ??
As for the clouding of the tank, and the fishes starting gasping and wanting to jump out, seems like the medication have sparked an unwanted chemical reaction, – so some kind of intoxication may be what has happened with your fish ?