I FINALLY decided to upgrade my wort aeration from using the piece you attach to a drill, to pumping pure O2 into my wort. Just received my oxynator today, bought a new O2 tank, and tested it in water to see how it works. The O2 comes out very slow through the diffusion stones, just small bubbles that break off the stone, and into the water, but at a slow pace. I was anticipating it to be a bit more vigorous. Was my anticipations wrong? Is it usually a pretty anticlimatic activity when expecting something a bit more vigorous?