I started treating my fish in the QT with Cupramine and the only test kit I found on hand is made by Sera. The gradient for measurement of copper is 0.1, 0.3, 0.6...etc. I emailed Sera to check if their test is sensitive enough for chelates copper and I'm still awaiting their response. I can't get the Seachem kit here nor the Salifret. There is one by JBL (jbl.de) so I'll write to them as well.
Has anyone used the Sera kits or does anyone know if the gradient for the Sera kit, as outlined above, would be considered sensitive enough? Any advice is appreciated.