MBU puffer skin problems

[Jenrn22]

any ideas on how to clear this? Ick treatment in tank now.

 

[Stanzzzz7]

Did you check for copper in the medication you gave?
I'm no expert on puffers but I believe they react badly to meds that contain copper.

 

[Angelphish]

Did you check for copper in the medication you gave?
I'm no expert on puffers but I believe they react badly to meds that contain copper.

I just did some research on puffers and copper isn't good for them. I thought it was only snails until now.