"Richard Lamb" wrote in message
...
Anthony wrote:

I don't know how big your tank is but if you can freeze it (-0 F.) then
you
should be able to get the J.B. Weld to break out easily.


An interesting idea.
My fridge won't do that low.
Maybe a box full of dry ice?

Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at around -100
F. If you try this wear a very thick and well padded glove.

Tony