I would take a gravity reading to see if it is actually fermenting. Regarding the oxygenation of the beer, listen to this podcast (August 7, 2008
) about shaking versus pumping. In their experiment, they have shown that an aquarium pump is no different than shaking a carboy or bucket. So, I would venture to say that if you did oxygenate your wort with your attachment you probably have as much saturation as your going to get without utilizing pure O2.