not 100% sure, but pretty sure carbon wont absorb copper
Carbon absorbs copper just fine.
So do Polyfilters, but carbon is cheaper.
To the OP: run a cup of carbon and you should be fine. You added 4 cups of "tainted" water to 55 gallons. That's not much. Don't sweat it unless you see signs from your tank inhabitants that they are unhappy. My guess is they won't even notice it.
Originally Posted by chort55
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