Are file fish sensitive to copper?

[Bthomas]

I have a Midas blenny and a filefish that I just received today in quarantine and wanted to put them both through my regular quarantine regimen but have heard that file fish are sensitive to copper. Has anyone else heard this? How would you treat them if so?

 

[Montiman]

I have never heard this. When I worked at an LFS we regularly treated file fish with copper without issues.