"I always say you do what works for you, but 1.5 liters per minute for 5 minutes of pure O2 is a lot of oxygen!"
My fingers betrayed me. That should have been 0.5 liters per minute.
I do have a prescription for oxygen. My fellow homebrew doctor friend wrote it for me. The company I use for re-fills looked at it once and noted it in my customer file and I have never had to show it again.
Brewing since 1989 - BJCP National Rank
Fermenting: McChouffe clone, Samiclaus clone
Conditioning: Belgian Tripel, Barrel Aged Baltic Porter - in sherry barrel, Belgain Easter Ale
On tap: CAP, Dortmunder Export, IIPA, Dubbel Chocolate Stout, Wee Heavy, Whiskey barrel aged Wee Heavy, Baltic Porter