Copper dose/copper level and time

[new2reefing123]

Hi all, I am doing a fallow to rid my DT of ich, have all my fish in QT and am dosing Seachem copper cupramine. It is pretty hard to differentiate the shades of blue on my Salifert copper test kit. I believe it is showing .5. I am going to compare with an API copper test I remember I have, and I also just ordered a hanna copper tester(not arrived yet). My question for you all is, I’ve heard the cupramine is therapeutic from .2 with toxic level being .8, what do you recommend? If I remember correctly, according to humble fish website, .5 is what I want. Opinions?

 

[new2reefing123]

API copper test is useless. Didn’t even register anything.

 

[Qasimja]

you want to shoot for .5 with cupramine

 

[Big G]

Therapeutic level of Cupramine is 0.50 mg/L in saltwater. What confuses people is that it is also used in freshwater and the therapeutic in FW is 0.25 mg/L.