I installed an electric hot water heater about 3-4 weeks ago. Everything has been operating without problem and there have been no detectable leaks around the water connections into and out of the water heater. However, I discovered what could be some corrosion starting on the hot water side. The connection is a stainless steel flex pipe without tape or compound (the pipe's tag said not to use any). I believe the hot water side connections are galvanized steel.
Is it possible for corrosion to form so quickly and if so what should I do about it? My first thought was to disconnect, cleanup, and try again with a new line. How quickly should I act?