fnfalman
Contributor
Eventually you'll want to get a SPG as a backup and "that hose" will be back.
Adam
Not necessarily. I know how long my tank lasts me underwater. If 40-minutes were to roll by and my tank still shows 2000-psi instead of 1000-psi, something is wrong and it's time to go up. Not only that but if one were to pay attention to the echo in the tank when one takes a breath, when the tank runs low, it has more of an echoing effect than when it's fuller. Not that I'm advocating the use of a timer and noise in lieu of an SPG, but there are lots of ways to know how much air your tank should have than just a gauge because gauges can get stuck too.