I now use red tape for trimix, green for nitrox and silver for air.
Makes little difference under the water but does work on the surface
Rememeber anything you read on the internet was probably written by some guy sitting at home in his underpants! Including this !!
Illegitimi non carborundum
what a fascinating thread lol
None diver as of 2018.
(Edit to the washable marker comment!)
White gorilla tape and Sharpie,
This thread should be a sticky