Hi all,
I brewed a wee heavy yesterday that had an OG of 1.095. I used a tube of WLP001 and a tube of WLP028. I pitched a 1.7 liter starter and aerated with pure O2 for 90 seconds. The lag time was about 8 hours and it was blowing off at about 12. I've read that some are adding a second dose of O2 at 12-18 hours on bigger beers. With the active vigorous fermentation, is the extra O2 necessary and am I just opening myself up for risk of contamination?