I just ordered some of this, and looked at the components on the bottle. I know I'm probably being really paranoid, but it says there is a miniscule amount of copper in the solution (specifically 0.0032%). Will this be harmful to snails/shrimp/other inverts? I'm not familiar with normal levels of trace elements, or what is enough to harm inverts, sorry! Â
 But I really like my nerites and hermit crab, and wouldn't want it to have any adverse effect on them.

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