Did I under oxygenate my wort? I am always Mr. Over Prepared, as I buy two of everything that could potentially run out of or break when I do something. I bought a new O2 tank from Ace before I brewed a Java Stout yesterday just to be on the safe side. When I went to oxygenate the wort my existing tank only put out about 30 seconds of a medium amount of oxygen before it went caput. I put the new tank on, and it was completely dead! Not even a trickle of air! I am using a 6.5 gallon carboy, so in my tired state I just swirled it as much as possible. In highsite I should have just not pitched my yeast starter, but I was exhausted so I said screw it it willl be fine. I woke up to it bubbling away 10 hours later at a bubble about every 10 seconds into the blow off bucket. Should I just let it go, or get the tank replaced and oxygenate it again. I am used to a vigorous airation of 90 to 120 seconds. I had an OG of 1.056 and used a decanted 1200 ml Wyeast Thames Valley #1275 starter.