Indeed, this was my experience exactly. In fact, its effect on my system is almost identical to Epsom Salts; i.e. intestinal rumbling followed by "butt-pee" and occasional bowel explosions. I far prefer Dr. John R. Christopher's herbal bowel formula; this encourages natural bowel movements by mildly irritating the bowel wall (thus dislodging accumulated waste) rather than liquefying the bowel contents. Some do enjoy the feeling of being "clean" inside, and I agree that this is how we should feel at all times; but I am in now way convinced that oxy-powder removes accumulated waste, and there is simply no way of proving that it does so...and I believe that if you are in doubt, seek something greater.
As to the benefits of oxygen and germanium, I would suggest that deep-breathing will provide far more oxygen than any pill, and if it is germanium you seek, then all-natural, mineral-rich maca has this in abundance...