PraziPro does nothing against Uronema or Vibrio.
The best course of action would be to set up another clean QT. Once that QT is ready give the surviving fish a formalin bath and transfer them to this new tank (tear the othe one down and sterilize everything in it).
Do not use a net to catch the fish - use a plastic or glass container, ideally a square or rectangular one. The last thing you want is to cause abrasions on the fish's skin that may become entryways for the pathogen.
How to proceed from there depends on what symptoms the fish show and how much of a risk you are willing to take.
Against Vibrio you would need a broadband antibiotic that targets gram negative bacteria.
Against Uronema you could give CP a shot - I would go this route if it is more prophylactic and the fish are not showing symptoms. If the fish show symptoms you may need to double the dosage. The issue here is that some fish can't be treated with CP (deadly for pipefish, seahorses, wrasses).
A more bulletproof method against Uronema would be daily formalin baths followed by tank transfers. I would do at least 5 transfers. But that's a lot more work intensive and more stressful to the fish. It also can't be used once the fish have open wounds. In case of an active infection the tank water may need to be dosed with Methylene blue and an likely also an antibiotic. Especially Methylene blue is not really good for fish either.
BTW: the bloating rather goes against Uronema and points more towards something bacterial.