New Dive Shop in Town

[Roger Southwick]

On a charter boat with a mixture of newer divers & nitrox divers, there's an advantage to having obvious markings.  You don't want a new diver who "knows" that scuba tanks contain compressed air to grab a tank of nitrox for a 130' dive.  Obvious markings would help.  (Of course, if they don't know what "nitrox" means, they're still in trouble.)

Also, those big stickers should technically be removed with every yearly visual tank inspection -- so it's a yearly expense to replace them.

For my own tanks, I follow Lonnie's procedure of analyzing & marking every time, even when it's air.