copper pipes usually dont have much of an efect if not any on the water for the fish.
im right now looking at my prime bottle and i dont see that heavy metals are iliminated but i would expect they are..
dont quote me on that.
next: prime elliminates chlorines but no amonia/
nitrate/
nitrite
it puts it on hold so it does not hert your fish for 24 or 48 hours? i forget the exact time...
its acualy in amazing how it works...
if u have plants it doesnt destroy its food source.... the nitrates...
if u dont have a planted aquarium then it still works wonderful...
it gives u the advantage on the toxins so u can do a water change the next day.