I would provide a current BUT place rocks (preferably flat ones) to form caves with no current in them so the newt can get out of the water flow. Also make sure that the current is not so strong that the newt cannot stand still on the bottom or rise up easily for air without being 'blown' around.
According to another article in a reptile mag (I have lent it to someone so I can't rememebr who it was by or which magazine, but I think it was Theismeier) said that water current is not important, but the crucial factor is clean, cool and well-oxygenated water.
Chris