
jlmcgrath wrote:Using an aquarium pump and a 2 micron stone for aeration. Puts a bit of foam on the top of the beer after about 30 min, but wondering if it may not be powerful enough. Was hoping for it to finish around 1.012-1.013
White Labs ran an experiment injecting pure oxygen into 5.3 gallons of 1.077 wort using a .5 micron stainless steel sintered stone at a flow rate of 1L per minute. The results show that to reach the desired 8 to 10 ppm, you would need to inject oxygen for only one minute.... Increasing the level of oxygen past 9ppm did increase the pace of fermentation slightly for the first 3 days but both ended at the same terminal gravity....Research also indicates the addition of oxygen at 12 hours into your lag phase increases fermentation speed by 33 percent...
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