Quote:
Originally Posted by reefwars
a frend and me yesterday were reading the ingredients and alot of these have copper traces in them  |
There are traces of copper in most things . . . most just don't list it. It probably won't be something that is added on purpose, but rather, that is naturally occurring.
Very small trace amounts are perfectly safe.
Look at the list of minerals for this very popular aquarium product:
http://www.aquavitro.com/products/fuel.html
I'm impressed that they have the gonads to actually list it in there.
Edit: Here's an interesting little article on copper concentrations in the ocean:
http://www.chemet.com/file.asp?F=Cop...PDF&C=articles