Soooo...what I ended up doing was a salt dip for everyone for 5 minutes just in case they had any on them. I put them in a holding tank, bare-bottomed (they hate that). I completely cleaned out and scrubbed everything and started the tank fresh using some media from what I know is a healthy tank. I checked parameters this morning and the tank was able to process 2 drops of ammonia so it should have no problem with 20 or so baby shrimp (non-orange shrimps are in a different tank already). I did not see any parasites on the animals but you just never know so I'm glad I did the salt dip. I felt really bad for them though and I could tell it was stinging them a bit as they were very jumpy. Sometimes medicine doesn't feel great. Everyone is alive and will be moving back to their tank today.
Thanks so much to everyone. I have 6 tanks and every other tank is great. I have no idea why this one is doing so badly.