Some dwarf angels are copper sensitive, but Cupramine is much less toxic to the fish and very well tolerated (IME.) I've never had an issue with any of my dwarfs (or any fish) being treated with Cupramine. I've got a nickel sized flame right now in QT with Cupramine.
They do tolerate hypo. But keep in mind that hypo is only affective against ich. Not velvet or flukes.
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