does copper affect the fish in your tank? help please !!

[sandoval]

does anyone know if copper affects the fish in your tank or if it just affect the snails and hermit crabs in your tank? because there so sensetive to copper.

[brooke]

Here's an archived thread that will give you a ton of info on the subject.

Snails and hermits dying!

[Reefland]

In a nut shell, copper is used as a medication to treat fish with parasites and disease. So at the right concentration fish can live with copper present. All invertebrates are unable to live though, copper at the smallest concentration is fatal.