Not to hi-jack the thread but I've seen those larger tanks cut up and used for some useful things. Our Scout troop had an end cut from one that we used as a base for fires. A farmer buddy has one that we use to cook Crawfish in. I expect a cut off one smaller than 1000 gallon would make a good smelting pot. Once the ends are cut off they make good culverts. Sorry for the hi-jack!