Just one more question for this week. I removed my water tank from the boat so that I could clean and paint under it. The tank sits on a wooden supports. When I inspected the tank I found it badly corroded and full of holes on the bottom. The tank is made from aluminum and has a ground wire attached to it. Any ideas as to why it would be full of holes. I'm planning on having one made out of stainless steel. Will that also corrode.