Hi Doug. Greg told me about a fiberglass propane tank that is somewhat
see-thru so we can see the water level. He recommended the 30 gallon one because
it has all the plumbing fittings included. It has a working pressure of 250# and
comes in different sizes. It's called "Lite" propane tank and when I searched it
on google, they were about $250 each for the large ones. I'm planning on using
two for a total of 60 gallons or 240 pounds. Frank D.