It is a relatively small tank, but I want to get one that is not so big that I can't easily keep it full. It is round and on a stand. I plan to build a simple cradle that I can use to take the tank to town on my flatbed trailer when I want have it refilled. We are far enough out of town that fuel delivery gets pretty expensive. When I buy a tank, it will be stored under cover in our hay barn. Scott, thanks for the info on the filters, that sounds very interesting. I'll also check to see if there are any tank cleaning services in the nearest large town.