By you picture. Not yet. It is working. The water attacks your anode rod instead of the hot water tank. I check mine every 6 months as a full timer. In some areas the water is more corrosive than in others, so if you travel check it often. You don't want holes in your tank. Be sure to have a spare one, so you can change it if needed. Be sure to get the right one. There are 2 different metals the rod is made of. I have a Suburban so mine might be different than yours. If you know which one you need....great. If not look it up on the internet using your brand name and model on the internet.