Equivalent value of 0.5 mg/L in Salifert copper test

[Dussumeiri]

I'm using Cupramine to treat Marine Velvet in my tank. Wondering if anyone knows the equivalent value of 0.5 mg/L in PPM since I have a Salifert Copper test kit.
Thanks

 

[andrewsmart]

try posting in the salifert part of the sponsors forum.