i bought a fish yesterday for my "fish" tank. i allowed the water from the bag into the tank. fish seemed fine and all was well in fishy world. that tank is part of the same sump system as my tank for cuttle eggs. its about 100 gallons total. stupid mistake, i know. my worry is that there was a small amount of copper in the fish bag. if there was, and it was a standard dose, would two pints of that water contaminate my system enough to harm the eggs?