Quote:
Originally Posted by smoothdog
More than likely copper was released into the tank from the bare electrified wire. If you haven't done a big water change yet I'd do one as soon as you can, and replace the carbon every few days until things start looking better.
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Maybe try this? It's supposed to absorb Copper and other heavy metals. I actually still have a 100g bag in my canister, I completely forgot about it until saw this thread.
http://www.seachem.com/Products/prod...CupriSorb.html