Well, what I saw the brewers at my local micro brewery do was inject O2 from a tank directly into the transfer tube between their brew kettle and the primary fermenter. They had the oxygen line spliced right into the line. Pretty cool, but not likely to be practical for the homebrewer
. Ah well. I have hear about using an aquarium pump with an airstone, immersed directly in your fermenter. I would worry about sanitation of the porus airstone in such a system, but I belive that plenty of people use it succesufully. I also know that they make an attachment to your siphon tube that basically spreads the steam of wort out a bit as you rack, allowing some natural aeration. I imagine you would only want to use this method if you have the means to cool your wort before racking (i.e. somes sort of wort chiller), as I have hear that splashing around your hot wort is a bad idea. All that I do to aerate is pour my cooled wart from the boil kettle (I haven't bought a wort cooler yet, so I just put the kettle in the bathtub w/ cold water) through a funnel into the primary fermenter, as this causes it to splash around abit. Seems to work alright -- D
