Coppersafe is completely removed with water changes. Cupramine reacts badly with prime and other reducing agents, plus it causes more adverse reactions in delicate fish species. Given a choice, I would always select coppersafe or even copper power.Coppersafe seems to be impossible to pull out of the DT, I know Cupramine is harsher, but I want to use something that doesn't bind so much, and gets pulled out with GAC better. I tried Cuprisorb, I tried Poly-filter, Coppersage is taking forever!!!
GAC is a poor way to remove copper, even with ionic forms like Cupramine.