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Copper and Other Trace Metals
One of the problems with metal toxicity is that it's almost impossible to
identify until it's too late. The reason being that many of the symptoms
(of heavy metal toxicity) are internalized, long-term and hard to verify.
Considering that copper along with other heavy metals is extremely toxic to
fish, even at low levels, I'm wondering if it makes any sense to add these
chemicals at all.
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