Just bumping this for a couple reasons...weighed my CO2 tank today (5#) and it weighed 11 pounds. It has a tare weight of 7.7#, so I assume that means I had 3.3 pounds left. Correct?
Secondly, I was hooking up a new regulator today and I forgot to put clamps on the gas line. Went out about 20 minutes later to check something, heard a hissing sound (you know what's next) and opened my kegerator to find a snow-white CO2 tank.
Thankfully, I only lost a half a pound but I'm pretty low now with only 2.8 pounds left. PSA, check your CO2 tanks!