Well the water is pretty cold but it's warmer than ice. So it will help if it melts away the ice. Getting the bottle in the sun will help some too.
Propane will stop boiling at -44 degrees. Not going to get that cold unless you're in Alaska in winter but it will slow down. As the propane boils it get's colder it absorbs heat through the surface of the bottle that is in contact with the liquid propane so the less propane in the bottle the less wetted area to absorb heat. Two small bottles have more wetted surface than one. The faster you use the propane the colder it will get. Blasters will cause the propane to boil faster and if the propane can't absorb enough heat it will cool to the point where you will notice the drop in pressure and BTU's per hour will fall off.
So on a winter trip when you need to burn propane at a high rate it performs the worst. So the bottom line is if your using lots of propane in the cold bring lots of it in different bottles.
In the summer I use my 10 pounder with several things running at once with no problem.
Hope this answers you question.
Originally Posted by Avatard
Yes if i was gonna buy two i would get a 20 in addition to my 10
My friend mimics every piece of gear i find a good deal on. So he has a 10 lb also. I have a spot on my Cat they fit nice and are balanced. And we can spread the cooking and water heating apart
So on a Feb Grand canyon trip cant you put the propane tank in river water to keep it from icing up?