I do not recommend it be dumped and filled with fresh gas. Never said that. The tank is out of hydro and vis. You dump the gas, get it hydro'd, vis'd, and then once passed refilled and used. You all do what you want. Just don't ever expect me to dive with anyone that would follow your advice or pull their butt out of the water should something happen. Recommending he analyze and use is not only stupid but would violate the agreement I sign every year as an instructor regarding safe diving practices. Not to mention my own morals and ethics when it comes to those practices. I bought four al 80 a couple years ago from people I not only knew but trained who getting out of diving. I knew who filled them and when. They were all full of nitrox compatible air. But the vis had just expired. I took them down to the shop, dumped them, did the vis, and then used them. I practice what I preach and do that to set an example for my students. Did I need to do that from a practical standpoint? No. I did need to do it from an ethical one.
Sent from my DROID X2 using Tapatalk 2