Hi,
I'm in the process of replacing an old rust cast iron tank in the aft engine
compartment. It is one of two on the port and starboard sides. The other
one was replaced before I bought the boat and is in good shape. (stainless
steel, 40 gallons.) I want to know if there is another type of tank that is
better than stainless steel. I know plastics/polymers have changed alot in
recent years. What's the best way to go and why? What are the costs?

Thanks