Aquarium water is usually room temp, but that is too cold for most fish, so there is usually a water heater in the tank to heat up the water to slightly above room temp. Therefore, to answer your question about weather or not the fish will die from the heat....probably not.
But to answer your question about weather or not they will die from copper in the water...they shouldn't, since Cu is not very reactive in water, but at the point where the tube enters the water, the copper may react with the air and form Copper Oxide, this may or may not be harmful to the fish. I'm not sure.
As for the toilet tank idea, that's good, but you do realize that you would need to keep the computer in the bathroom, or run copper pipes from your bathroom to your computer room or bedroom. Depending on your house layout, that's a lot of pipes. I doubt your significant other would sign off on such an endeavor.
|