if you are going to keep this system going after the fact, I would just leave the copper in it for your next purchase
if testing for ammonia, you will get a positive reading because some with bind with the copper - should typically show less some ammonia when tested but I found it to be less than lowest point on the API test - so it will test positve for ammonia but not by much.
as asylum mentions, don't use any other medications because they can bind with the ammonia and kill the fish and use the bare minimum of prime
Neal
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Way too much time and money has gone into this hobby....and yet, I CAN'T STOP
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