I use a 6gal primary and a 5gal secondary, I had been shaking my primary after cooling and siphoning. I went to the store and bought an aquarium pump and one of those blue bubble rocks and used it (after sanitizing it and the hose) while I am siphoning into my primary and let it run for about 15-20 min before I add my yeast. I have used it on 5 or 6 batches and havn't had a problem, and my beer seems to be alot clearer and less sweet than it was (which I think is great). anybody else ever use one of those rocks, had any problems with them?
Monkeyboy