Also, I went over to airgas at Juice's recommendation and the chick that helped me out was super helpful. I bought a 40CF tank of C25, which should be plenty to get me by for a while. I thought I wanted an 80CF tank... turns out, the 40CF tank is what I thought the 80Cf tank was.

I would have had to go home and pick up the truck if I were buying the 80CF tank.