211ratsbud
Contributor
I do have permanent markings on the tanks. This is analysis and confirmation otherwise.Same. If I'm prepping cylinders at home, I'll usually cut it and mark the percentage, MOD, pressure in the tank, and date.
If I do it at the fill station on the way to the dive site... it's just getting percentage and maybe MOD. Chances are all four of my steels are going to have the same or very similar gas mixes in them...
For others I can see why they might need something more durable.