I don't THINK Quick Cure will help fin rot. I would use Pimafix for the fin rot.
OK, here's what I think. Somebody correct me if I'm wrong. Leave your ph alone at this point. If you try to change it that will just be one more stresser for them. And really alot of people on here will tell you a STABLE ph is more important than the actual number. So I wouldn't really worry about the ph at all. At least for now.
With your ammonia and nitrites both at 1ppm I would do 50% water change asap. That would put the readings at .50. Then do another tomorrow. This is probably the cause of your problems. The ammonia is burning them which is why the one is trying to jump out. Nitrites rob them of oxygen. My bet is that you don't even need the Quick Cure. You just need good clean water. Your tank is not fully cycled and your gonna have to do LOTS of water changes to keep the ammonia and nitrites at more tolerable levels until they are completely gone. I really think partial water changes are the answer to your problem. Quit the Quick Cure. Add Melafix or Pimafix for the fin rot. And keep testing the water so you know what your readings are at all times then do water changes accordingly.
There are a few products for slime coat regeneration. Start Right with Allantoin or Tetra AquaSafe both help with that. Most of your water conditioners have stuff for slime coats. Do you use any type of water conditioner? You need to if you use tap water for water changes.
phew. lots of info. BTW, welcome to mft! Keep us updated.