Copper resistant velvet

[AQD_ottawa]

Does anyone know how to get rid of velvet that is resistant to copper?

Fish been in .50ppm copper for 3 weeks and broke out in velvet 6 days ago, no idea how to cure!

It's definitely velvet. All fish breathing fast and clowns covered, nothing died yet but only time.

 

[HumbleFish]

I would use this. Also, read this for how to provide immediate relief via a f/w dip, formalin dip. Just know that Velvet is a very formidable foe; very few are successful in eradicating it.