Bit the bullet and picked up a welder o2 bottle today, for aerating wort. I also picked up an argon regular(modded for o2), so I could really dial down the o2 to a reasonable amount.
Problem is that the flowmeter is not psi, but CFH - cubic foot per hour. Starts at 5 CFH and goes up to 40 CFH. I just can't figure out where to set it. Anyone have any experience with this?
The guys at the welding supply shop said to set it at 10. But, I would really like a little more confirmation on the right setting, and time to leave it on.
(I've heard that you can over oxygenate your wort. Is that true?)