<a href=showthread.php?s=&postid=7089526#post7089526 target=_blank>Originally posted</a> by LargeAngels
One or the other. Not both. Make sure that if you are using the Hypo that it really is ich and don't use the swing type hydrometer. Hypo won't cure velvet.
If you use Cupramine, which I highly recommend, buy yourself a RedSea copper test kit. I and others (including an online vendor) have had quality problems with the Seachem copper test kits being very unreliable. Don't assume that just because that reference sample they give you turns out ok that the whole test kit is ok. Personally I won't use it anymore.