I didn't realize my fish were sensitive. I've had to use strong meds before and my angels were fine.
Update:My small angel didn't make it

When i checked the tank this morning, she wasn't swimming and her side fins were barely moving. It was pretty horrible to watch.
As I read your last post, I went to check my ammonia and found my large angel dead. Its very weird bc there were no white patches on either, and no trailing slime but definitely extra slime on entire body. her dorsal was very clamped... when i went to flush her, she dropped to the bottom of the toilet so fast, like she weighed so much. maybe the extra slime?? sigh.... this is very depressing...
Tank updates: my ammonia is great, but i did do a PH test, which has never ever been an issue for me, and it is 7.6 if not a bit higher. Im thinking this is pretty bad? but again Im not a ph expert, I always have my lfs do the ph testing for me, its actually the first ph test I've done at home. I'm assuming the copper raised the ph?
Thanks for all the help Wilder