I had 1/2 lb, when I got a bigger wine-o-dor I needed another 1 lb. When I got them I noticed a huge difference in color. The new ones were pure white but my older ones (probably around 1 year) were brown. They are not black like some of you are mentioning. Think the brown is mold too? I mixed them with my new beads so I really hope it is not mold.
Dan