Mike, I see that you found the leak. FYI, before you pull tank and
submerge it, go to your friendly local Gas Company (not the front office)
and ask one of the guys (perhaps driving a service truck)if he would use
his sniffer on your tank. These detect gas, not odorant. In the long run,
this would save you all that time removing the tank. If you did remove it,
you might as well contact a welding outfit and inquire where you can get
it Xrayed. Now that would settle any questions you might have.
One thing, when you use the soapy water method, make sure to hit the valve
stems with some. This is a common place for leaks. Good Luck. Miguel
PS Have no fears. I saw your picture and, well, nothing you could do, no
hobby you could take up, that could make me think you are a woman.....and,
what are you doing wearing my shirt?