As far as your experience with lethal copper toxicity goes, does it make a difference between cupramine and coppersafe or power?
Cupramine has a documented adverse reaction when combined with reducing agents like Prime. It is also more difficult to test and measure (more narrow dose range). Coppersafe has no issues in that regard. Copper Power is similar, but I have less experience with that. Ionic copper/citric acid (old school) is what causes the most issues with acute toxicity. There is no evidence of delayed toxicity with any copper product.
Jay