Originally Posted by Fishies_in_Philly
I don't know about using copper tubing. I would be concerned about copper leaching into the water column. While it's not as important to fish, if you plan on having any inverts in this tank, the copper could be deadly. There are much safer and easier to work with materials.
i personally have no clue how copper line would affect inverts but they do make the exact same refrigerator water line out of plastic, another nice thing with the plastic versus copper is the plastic is way easier to manipulate and form.