go to a car wash and get one that had soap in it. Rinse real goos and you are in business. I built one from a 55 gal tank and didn't set it on it's side as I would have to bend over too far to work with it. I liked the height of the 55 gal drum standing up. You can see my post about the tank I built about 20 post down from this one on the main board. Title is Minnow tank by sac-a-lait.