Treatments with stingrays

[Samantha95]

Hello
I have a wallace ray in with my discus and one of the discus is showing worrying signs.
tested my water and it’s fine, done large water changes but no improvement.
I have never put a treatment in this tank other than the basic wormers and aquasafe.
does anyone know if
eSHa HEXAMITA
DISCUS DISEASE TREATMENT is safe to use with the ray in the tank?
Many thanks

 

[Ansorgii]

It contains copper which is as far as I am aware of not liked by stingrays

 

[Samantha95]

It contains copper which is as far as I am aware of not liked by stingrays

Thank you!